Reciprocal association between pain and quality of life after newly acquired spinal cord injury.

PURPOSE: Pain is highly prevalent in spinal cord injury (SCI) and a key determinant of quality of life (QoL). This is the first study to examine reciprocal associations between pain and QoL in patients undergoing their first inpatient rehabilitation after SCI. METHODS: Longitudinal data, with three measurement time points (1 month and 3 months after SCI onset, and at discharge from inpatient rehabilitation) from the Inception Cohort of the Swiss Spinal Cord Injury Cohort Study. Participants were 381 individuals aged ≥ 16 years with a newly diagnosed traumatic or non-traumatic SCI. 75.1% were male and the average age was 53.2 years. Random intercept cross-lagged panel models were conducted to examine the reciprocal association between pain intensity and QoL, as measured with the International SCI QoL Basic Data Set three individual items (satisfaction with life, physical health, and psychological health) and total score (mean of the three individual items). RESULTS: Both item and total QoL scores increased over time. 1 month: 5.3 (SD = 2.7), 3 months: 5.9 (SD = 2.3), discharge: 6.6 (SD = 2.0). Participants reported relatively low levels of pain intensity that remained stable over the course of inpatient rehabilitation. 1 month: 2.7 (SD = 2.3), 3 months: 2.6 (SD = 2.4), discharge: 2.7 (SD = 2.5). There were no significant cross-lagged associations between QoL and pain intensity across time. CONCLUSION: Results indicate that pain intensity does not predict changes in QoL during first rehabilitation, and vice versa. Associations between pain intensity and QoL reported by previous studies may be attributable to individual characteristics and timely events that simultaneously influence pain and QoL.

Does gender moderate the association between socioeconomic status and health? Results from an observational study in persons with spinal cord injury living in Morocco.

Background: Socioeconomic status (SES) and gender are well-known social determinants of health. However, their impact on health in populations with physical disabilities in low-resource countries is still lacking. Therefore, the objective of this study was to investigate associations of individual SES with health and the moderating effect of gender on this association in a Moroccan population with a physical disability, namely spinal cord injury. Methods: Cross-sectional survey data from 385 participants with spinal cord injury living in Morocco were analyzed. SES was operationalized by education level, household income, financial hardship, and subjective social status. Health indicators included secondary conditions, pain, vitality, quality of life, and general health. Associations between SES and health indicators were investigated using linear and logistic regressions. To test the potential moderation of gender, interaction terms between SES and gender were introduced in regression models. Results: Financial hardship and lower subjective social status were associated with poorer health outcomes in four out of five indicators in the total sample. In contrast, education and income were inconsistently associated with health. Overall, gender did not moderate the association between SES and health, except that educational inequalities in general health were more pronounced in women, and the observation of a trend for a stronger negative effect of subjective social status on men's than woman's health (p > 0.05). Conclusion: This study revealed that subjective indicators of SES negatively impact on health, whereas evidence for the moderating role of gender in this association was weak. These findings underline the importance to reduce social marginalization and poverty in populations with disabilities in low-resource countries to reduce their double burden of living with a disability and encountering social disadvantages through low SES.

Australian arm of the International Spinal Cord Injury (Aus-InSCI) community survey: 1. population-based design, methodology and cohort profile.

STUDY DESIGN: Cross-sectional survey. OBJECTIVES: To describe design and methods of Australian arm of International Spinal Cord Injury (Aus-InSCI) community survey, reporting on participation rates, potential non-response bias and cohort characteristics. SETTING: Survey of community-dwelling people with SCI at least 12 months post-injury, recruited between March 2018 and January 2019, from state-wide SCI services, a government insurance agency and not-for-profit consumer organisations across four Australian states. METHODS: The Aus-InSCI survey combined data for people with SCI from nine custodians, using secure data-linkage processes, to create a population-based, anonymised dataset. The Aus-InSCI questionnaire comprised 193 questions. Eligibility, response status and participation rates were calculated. Descriptive statistics depict participant characteristics. Logistic regression models were developed for probability of participation, and inverse probability weights generated to assess potential non-response bias. RESULTS: 1579 adults with SCI were recruited, a cooperation rate of 29.4%. Participants were predominantly male (73%), with 50% married. Mean age was 57 years (range 19-94) and average time post-injury 17 years (range 1-73). Paraplegia (61%) and incomplete lesions (68%) were most common. Males were more likely than females to have traumatic injuries (p < 0.0001) and complete lesions (p = 0.0002), and younger age-groups were more likely to have traumatic injuries and tetraplegia (p < 0.0001). Potential non-response bias evaluated using selected outcomes was found to be negligible in the Aus-InSCI cohort. CONCLUSIONS: The Aus-InSCI survey made efforts to maximise coverage, avoid recruitment bias and address non-response bias. The distributed, linked and coded (re-identifiable at each custodian level) 'virtual quasi-registry' data model supports systematic cross-sectional and longitudinal research.

Socioeconomic Status, the Countries' Socioeconomic Development and Mental Health: Observational Evidence for Persons with Spinal Cord Injury from 22 Countries.

Objectives: Evidence on social inequalities in mental health of persons with physical impairments is limited. We therefore investigate associations of individual-level socioeconomic status (SES) and the country-level socioeconomic development (SED) with mental health in persons with spinal cord injury (SCI). Methods: We analyzed data from 12,588 participants of the International SCI Community Survey from 22 countries. To investigate individual-level inequalities, SES indicators (education, income, financial hardship, subjective status) were regressed on the SF-36 mental health index (MHI-5), stratified by countries. Country-level inequalities were analyzed with empirical Bayes estimates of random intercepts derived from linear mixed-models adjusting for individual-level SES. Results: Financial hardship and subjective status consistently predicted individual-level mental health inequalities. Country-level SED was inconsistently related to mental health when adjusting for individual-level SES. It however appeared that higher SED was associated with better mental health within higher-resourced countries. Conclusion: Reducing impoverishment and marginalization may present valuable strategies to reduce mental health inequalities in SCI populations. Investigations of country-level determinants of mental health in persons with SCI should consider influences beyond country-level SED, such as cultural factors.

Untangling the role of social relationships in the association between caregiver burden and caregiver health: an observational study exploring three coping models of the stress process paradigm.

BACKGROUND: Caregivers health is often at risk due to the detrimental effects of caregiver burden. It is therefore vital to identify strategies and resources, which ensure the safeguarding of caregivers' health, whilst also enabling caregivers to continue providing high quality long-term care to care-receivers. The objective of this study is therefore to examine the moderating and mediating role of different social relationship constructs (social networks, social support, relationship quality, and loneliness) in the relationship between subjective caregiver burden and health, by exploring different coping models of the stress process paradigm, namely the stress buffering, social deterioration and counteractive models. METHODS: Longitudinal survey data from 133 couples of caregiving romantic partners and persons with spinal cord injury, living in Switzerland were used. We employed multivariable regression analysis with the inclusion of interaction terms to explore moderation effects of social relationships (i.e. stress buffering model), and path analysis to explore mediation effects (i.e. social deterioration vs. counteractive model) of social relationships on the association between subjective caregiver burden and health. Health was operationalised using the following outcomes: mental health, vitality, bodily pain and general health. RESULTS: Social support and relationship quality were found to buffer the negative effects of subjective caregiver burden on mental health. Mediating effects of social relationships were observed for mental health (indirect effect -0.25, -0.42- -0.08) and vitality (indirect effect -0.20, -0.37- -0.03), providing support for the deterioration model. Loneliness was found to be a particularly important construct on the pathway from caregiver burden to health. CONCLUSION: Our study highlights the potential of social support and relationship quality to override the negative consequences of caregiver burden on mental health and vitality. Our evidence thus supports the advance of interventions that seek to improve qualitative aspects of social relationships, especially in caregivers experiencing a high subjective caregiver burden.

Epidemiology of spinal cord injury in China: A systematic review of the chinese and english literature.

STUDY DESIGN: Systematic review. OBJECTIVES: We aimed to provide a comprehensive overview of the English and Chinese literature reporting epidemiological data on spinal cord injury (SCI) in China. METHODS: 3 English and 3 Chinese language electronic databases were searched from the earliest record to 15 March 2020. Sociodemographic characteristics, incidence rates, etiology and lesion characteristics, in-hospital mortality, and secondary health conditions and complications were extracted from included reports. RESULTS: A total of 51 studies were included, 32 in the Chinese language. Forty-seven studies were based on hospital records. Mean age of incident cases ranged from 34 to 55 years and male-to-female ratios ranged from 0.35:1 to 15.3:1. SCI incidence varied from 14.6 to 60.6 per million. Thirty-five studies reported only on traumatic SCI with traffic accidents, high falls, low falls and being hit by objects being the most common causes. Specific causes for non-traumatic SCI were poorly reported. Proportions with tetraplegia and complete injury ranged from 37.4% to 82.0% and 14.1% to 73.9%, respectively. Reported in-hospital mortality attributed to SCI varied from 1.1% to 18.4%. Leading cause of in-hospital mortality for acute SCI was respiratory problems; respiratory problems, urinary tract infections and pressure sores were the most common complications. CONCLUSION: Epidemiological data on SCI in China are only available for a limited number of provinces and mostly outdated. Updated data on incidence with accurate geographical information and etiology across all Chinese provinces are needed for targeted implementation of preventive strategies. Research on community outcomes needs to be developed in China.

Does the socioeconomic status predict health service utilization in persons with enhanced health care needs? Results from a population-based survey in persons with spinal cord lesions from Switzerland.

BACKGROUND: Evidence suggests that the socioeconomic status (SES) affects individuals' health service utilization. Spinal cord injury is a condition that often leads to physical impairments and enhanced health care needs. It therefore presents an informative and yet under-researched case in point to investigate social inequalities in health service utilization. This study aims to describe associations between SES and health service utilization in adults with spinal cord injury from Switzerland. METHODS: We use cross-sectional data from 1,294 participants of the Swiss Spinal Cord Injury Cohort Study community survey 2017. SES was operationalized with education, household income, perceived financial hardship, subjective status, and granting of supplementary financial benefits. Health service utilization was assessed with information on visits to 13 different health care providers and four health care institutions (inpatient stays, outpatient clinics, emergency departments, specialized spinal cord centers) during the past 12 months. The dichotomized outcomes on service utilization (visited vs. not visited) were regressed on SES indicators, including adjustments for sociodemographics, lesion characteristics, and health status. RESULTS: Persons with higher SES reported higher likelihood for specialist, dentist, and dental hygienist visits and reported utilizing a larger number of different care providers. Further, specific SES indicators were associated with certain care provider visits (i.e., higher education and subjective status: higher odds for pharmacist visits; higher income: higher odds for natural healer visits; higher subjective status: higher odds for chiropractor visits; supplementary benefit granting: higher odds for general practitioner and home care service visits). We found statistically non-significant trends towards lower likelihood for inpatient stays, outpatient clinic and emergency department visits and enhanced likelihood for specialized spinal cord-center visits in higher SES groups. CONCLUSIONS: This study generally supports the claim that basic health care provision is guaranteed for all patients with spinal cord injury in Switzerland, independently of their SES. However, social inequalities were still observed for the utilization of specific providers, such as oral health care providers. Given that oral health is key for health maintenance in persons with spinal cord injury, specific interventions to enhance regular dental check-ups in lower SES groups are highly recommended.

Pain Trajectories During Initial Rehabilitation After Spinal Cord Injury: Do Psychosocial Resources and Mental Health Predict Trajectories?

OBJECTIVE: To identify classes of pain trajectories during initial rehabilitation after spinal cord injury (SCI) and to investigate whether psychosocial resources and mental health predict pain trajectory membership. DESIGN: Longitudinal analysis with prospective data from the Inception Cohort of the Swiss Spinal Cord Injury Cohort Study. SETTING: Initial rehabilitation in 4 SCI specialized rehabilitation centers in Switzerland. PARTICIPANTS: Individuals aged ≥16 years with newly diagnosed traumatic or nontraumatic SCI admitted to initial rehabilitation between August 2015 and April 2021 (N=343). INTERVENTION: Not applicable. MAIN OUTCOME MEASURES: Pain intensity was assessed at 4 time points (4, 12, and 24 weeks after SCI and at discharge) with 1 item of the International SCI Basic Pain Dataset asking participants to rate their average pain intensity experienced during the past week on a 0-10 numeric rating scale. RESULTS: Four pain trajectories were identified by latent process mixed modeling: stable moderate pain (N=170, 49.6%), decreasing pain (N=36, 10.5%), increasing pain (N=16, 4.7%), and stable low pain (N=121, 35.3%). Participants with higher optimism (ß = 0.12; 95% confidence interval [CI], 0.03-0.22), more social support (ß = 0.30; 95% CI, 0.01-0.59), and less anxiety (ß = -0.13; 95% CI, -0.24 to -0.01) 1 month after injury were more likely to be classified to the decreasing pain than the stable moderate pain trajectory in adjusted analyses. Self-efficacy, purpose in life, and depressive symptoms did not predict this allocation when adjusting for sociodemographics, SCI characteristics, and pain medication. CONCLUSIONS: These findings highlight the importance of psychosocial resources and mental health for early pain trajectories after SCI onset and support the notion that strengthening psychosocial resources and mental health early after SCI could present promising targets in pain management.

Internal consistency and convergent validity of the International Spinal Cord Injury Quality of Life Basic Data Set at discharge from first rehabilitation.

STUDY DESIGN: This study is a cross-sectional analysis using data from the Swiss Spinal Cord Injury Cohort Study. OBJECTIVES: To examine internal consistency and convergent validity of the International Spinal Cord Injury Quality of Life Basic Data Set (QoL-BDS) at discharge from first inpatient rehabilitation. SETTING: The study was performed at four rehabilitation centers in Switzerland. METHODS: Participants were Swiss residents aged over 16 years newly diagnosed with traumatic or non-traumatic spinal cord injury (SCI). Measures included the QoL-BDS, World Health Organization Quality of Life (WHOQOL) items, Hospital Anxiety and Depression Scale (HADS), and Spinal Cord Independence Measure III (SCIM). RESULTS: A total of 495 participants were included. In all, 57% had a traumatic SCI, 71.1% a motor complete SCI, and 33.3% had tetraplegia. Mean age was 53 (SD = 16.4) years and 68% were male. No floor or ceiling effects were found. Inter-correlations were strong (0.73-0.80) and Cronbach's alpha was good (0.88). QoL-BDS mean scores were 6.4 (SD = 2.2) for life satisfaction, 5.8 (SD = 2.4) for physical health, 6.9 (SD = 2.4) for psychological health, and 6.4 (SD = 2.1) for total QoL. Correlations with reference measures were strongest for QoL-BDS total and WHOQOL general quality of life (r = 0.67), QoL-BDS physical health and WHOQOL health and daily activities (r = 0.64 and 0.53), and QoL-BDS psychological health and HADS depression and anxiety (r = -0.64 and -0.69). SCIM correlated weakly with all QoL-BDS items. CONCLUSIONS: The QoL-BDS revealed no floor or ceiling effects and demonstrated good internal consistency and convergent validity in individuals with SCI assessed at discharge from first rehabilitation. This study supports the clinical routine use of the QoL-BDS.

Who is at Risk of Loneliness? A Cross-sectional Recursive Partitioning Approach in a Population-based Cohort of Persons With Spinal Cord Injury.

OBJECTIVE: To develop a more thorough understanding of the risk factors for loneliness in persons with a physical impairment, using a population-based sample of persons with spinal cord injury (SCI), based on regression modeling and a recursive partitioning approach. DESIGN: Cross-sectional, observational cohort. SETTING: Community, Switzerland. PARTICIPANTS: Community-dwelling persons with spinal cord injury (N=1283) 16 years or older. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Loneliness was assessed using a modified version of the UCLA Three-Item Loneliness Scale. RESULTS: Those with the most disadvantaged socioeconomic characteristics in terms of education, income, subjective social position, employment status, and financial hardship demonstrated the highest risk for loneliness. Of the sociodemographic characteristics, only age had an association with loneliness, whereby persons aged 31-45 had the highest propensity for experiencing loneliness. We also saw that those with higher lesion levels and less functional independence were associated with higher levels of loneliness. In conditional inference tree analysis subjective social position, financial hardship, and functional independence had the highest discriminative power, with nationality and living arrangement having a less important role. CONCLUSIONS: Our findings highlight the vulnerability of persons with SCI with unfavorable socioeconomic status to loneliness. Furthermore, our findings show that persons who are more constrained because of functional limitations may face restrictions to social participation and therefore be at a higher risk of loneliness. This population-based evidence contributes to the better targeting of services aimed at alleviating loneliness for persons with a lower socioeconomic position and those with more functional limitations in everyday life.

Are Positive Psychology Interventions Efficacious in Chronic Pain Treatment? A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

OBJECTIVE: Although positive psychology interventions (PPIs) are increasingly popular in chronic pain treatment their efficacy is still unclear. The objective is to summarize evidence on the effect of PPIs on pain, physical functioning, and emotional functioning in adults with chronic pain. METHODS: Four electronic databases and additional references were searched for randomized controlled trials (RCTs) published between 1990 and 2020. Findings from included studies were qualitatively and quantitatively synthesized, and study quality was assessed for risk of bias. A random effects meta-analysis model was applied for outcomes with more than four findings. RESULTS: Of 16 included RCTs, almost half delivered PPIs as self-help online interventions, and half conducted guided face-to-face interventions which lasted mostly eight weeks. Results from meta-analysis showed beneficial effects of PPIs compared to the control group on pain intensity and emotional functioning (i.e., less depressive symptoms, pain catastrophizing, negative affect; more positive affect) post-intervention. At 3-month follow-up, beneficial effects were maintained for depressive symptoms and positive and negative affect, but not for pain catastrophizing. However, the evidence on the long-term efficacy of PPIs and the efficacy of PPIs on physical functioning remains limited. CONCLUSIONS: This review supports the notion that PPIs are beneficial to chronic pain treatment, although further, high quality research is needed to support this conclusion.

People with spinal cord injury in Morocco: results from the very first systematic data collection.

PURPOSE: To report on the methodology, participant characteristics, and associations of four most frequent environmental barriers with health conditions, general health and quality of life (QoL) in the very first systematic data collection in people with spinal cord injury (SCI) in Morocco. MATERIALS AND METHODS: We obtained data from 385 participants of the cross-sectional Moroccan SCI community survey (MorSCI). We used descriptive statistics to describe participant characteristics and regression models to investigate associations of the five most frequently reported environmental barriers with health conditions (secondary conditions, pain intensity, mental health), general health and QoL. RESULTS: The most frequently reported environmental barriers were "lack of public services" (92.5%), "financial strain" (93.0%), restricted access to "public transportation" (85.5%), "public places" (83.9%) and "private places" (84.7%). People who perceived those factors as barriers also reported more secondary conditions, higher pain intensity, lower mental health, lower general health, and lower QoL. CONCLUSIONS: This study on Moroccans with SCI found that environmental barriers detract from health and QoL. Given that environmental barriers are potentially modifiable, policy interventions present powerful tools to reduce barriers and potentially increase health and QoL in this vulnerable population.IMPLICATIONS FOR REHABILITATIONPublic policy on the construction of transportation and public places is important to make the physical environment accessible for wheelchair users to support their participation in society.The provision of adequate rehabilitation services and specialized post-acute rehabilitation units for people with SCI in Morocco is urgently needed, not only to contribute to health and QoL but also to contribute to their abilities to overcome environmental barriers.Adequate state services including universal health coverage and access to rehabilitation services and assistive devices or adapted tools must be a priority on the policy level to facilitate activities of daily living and reduce barriers.Improving the skills and knowledge of health professionals in SCI rehabilitation and guide policy makers to promote patient education and self-advocacy in the meantime, may help reduce the gap between needs of people with SCI and available support.

Longitudinal measurement invariance of the international spinal cord injury quality of life basic data set (SCI-QoL-BDS) during spinal cord injury/disorder inpatient rehabilitation.

PURPOSE: This study aimed at testing the internal consistency and longitudinal measurement invariance of a brief quality of life questionnaire-the spinal cord injury quality of life basic data set (SCI-QoL-BDS)-among individuals with spinal cord injury/disorder undergoing first inpatient rehabilitation. METHODS: Longitudinal data from the Swiss spinal cord injury inception cohort study were used. Participants (n = 218) completed the SCI-QoL-BDS at one and three months post injury and at discharge. The SCI-QoL-BDS consists of three items assessing satisfaction with life as a whole, physical health, and psychological health. Internal consistency was examined at each time point and longitudinal measurement invariance was tested using longitudinal confirmatory factor analysis. RESULTS: Internal consistency coefficients ranged between .82 and .90. The confirmatory factor analysis revealed invariance of the factor structure and of all factor loadings across time. Additionally, all item intercepts except the one of satisfaction with physical health were invariant across time, suggesting partial intercept invariance of the SCI-QoL-BDS. Indeed, a response shift was observed in satisfaction with physical health. This item was evaluated more negatively in the early phase of inpatient rehabilitation, indicating the change of the evolving physical situation after the onset of a spinal cord injury. CONCLUSION: The SCI-QoL-BDS is a consistent and valid measure to assess quality of life among individuals undergoing first spinal cord injury/disorder inpatient rehabilitation. However, we recommend using latent variable frameworks instead of mean scores when examining longitudinal changes in the measure to account for potential response shift.

Pathways to loneliness: a mediation analysis investigating the social gradient of loneliness in persons with disabilities in Switzerland.

BACKGROUND: The experience of loneliness can have drastic consequences for health and quality of life. Given that loneliness is highly prevalent in persons with physical disabilities and that loneliness more profoundly affects persons of low socioeconomic status, more evidence is required in order to understand the mechanisms determining loneliness in this population. The objective of this study is therefore to investigate the potential pathways through which socioeconomic status influences loneliness in persons with spinal cord injury. METHODS: Mediation analysis utilising structural equation models and bias corrected and accelerated confidence intervals were used in order to test the mediation effects of health status, functioning, participation, social support and self-efficacy on the association between socioeconomic status and loneliness in persons with spinal cord injury. A latent construct was created for socioeconomic status with the indicators education, household income, financial hardship, subjective social status and engagement in paid work. RESULTS: This study found evidence to support the mediating role of psychosocial resources and of secondary health conditions in the association between socioeconomic status and loneliness. The study demonstrated robust associations between socioeconomic status and all potential mediators, whereby higher socioeconomic status was associated with better health, participation and psychosocial resources, however, not all potential mediators were associated with loneliness. The serial mediation model explained the interplay between socioeconomic status, mediators on different levels, and loneliness. For example, emotional support and self-efficacy were both positively associated with fewer restrictions to participation (0.08 (CI: 0.05, 0.12); 0.29 (CI: 0.24, 0.36) respectively), and fewer restrictions to participation were found to be a result of improved functional independence and fewer secondary health conditions (0.23 (CI: 0.15, 0.39); - 0.29 (CI: - 0.36, - 0.20) respectively). CONCLUSIONS: Our findings highlight the vulnerability of persons with low socioeconomic status to loneliness in persons with spinal cord injury and identified potential mediating factors, such as health, functioning, participation and psychosocial resources, in the association between socioeconomic status and loneliness. This population-based evidence suggests potential targets of interventions on the pathway to loneliness, through which socioeconomic status influences loneliness. The complexity of the model shows the need for comprehensive interprofessional rehabilitation to identify and support people with lower socioeconomic status and concomitant risk factors for loneliness.

Are Social Relationships an Underestimated Resource for Mental Health in Persons Experiencing Physical Disability? Observational Evidence From 22 Countries.

Objectives: As advancing evidence on modifiable resources to support mental health in persons experiencing physical disabilities is of particular importance, we investigate whether structural and functional social relationships relate to mental health in people with spinal cord injury (SCI). Methods: Data from 12,330 participants of the International SCI community survey (InSCI) from 22 countries were analyzed. Structural (partnership status, living situation) and functional aspects of social relationships (belongingness, relationship satisfaction, problems with social interactions) were regressed on the SF-36 mental health index (MHI-5), stratified by countries and for the total sample using multilevel models. Results: Functional aspects of social relationships were consistently related to clinically relevant higher MHI-5 scores and lower risk of mental health disorders (MHI-5 >56). Structural social relationships were inconsistently associated with mental health in our sample. Conclusion: This study provides evidence that functional aspects of social relationships are important resources for mental health. Interventions to establish and maintain high quality relationships should be considered in public health interventions and rehabilitation programs to reduce long-term mental health problems in persons experiencing physical disabilities.

Socioeconomic status and social relationships in persons with spinal cord injury from 22 countries: Does the countries' socioeconomic development moderate associations?

BACKGROUND: Social relationships are powerful determinants of health and inequalities in social relationships across socioeconomic status (SES) groups may contribute to social inequalities in health. This study investigates inequalities in social relationships in an international sample of persons with spinal cord injury and explores whether social gradients in relationships are moderated by the countries' socioeconomic development (SED). METHODS: Data from 12,330 participants of the International SCI Community Survey (InSCI) performed in 22 countries were used. We regressed social relationships (belongingness, relationship satisfaction, social interactions) on individual SES (education, income, employment, financial hardship, subjective status) and countries' SED (Human Development Index) using multi-level models (main effects). To test potential moderation of the SED, interaction terms between individual SES and countries' SED were entered into multi-level models. RESULTS: Paid work, absence of financial hardship and higher subjective status were related to higher belongingness (OR, 95% CI: 1.50, 1.34-1.67; 1.76, 1.53-2.03; 1.16, 1.12-1.19, respectively), higher relationship satisfaction (OR, 95% CI: 1.28, 1.15-1.42; 1.97, 1.72-2.27; 1.20, 1.17-1.24, respectively) and fewer problems with social interactions (Coeff, 95% CI: 0.96, 0.82-1.10; 1.93, 1.74-2.12; 0.26, 0.22-0.29, respectively), whereas associations with education and income were less consistent. Main effects for countries' SED showed that persons from lower SED countries reported somewhat higher relationship satisfaction (OR, 95% CI: 0.97, 0.94-0.99) and less problems with social interactions (Coeff, 95% CI: -0.04, -0.09- -0.003). Results from moderation analysis revealed that having paid work was more important for relationships in lower SED countries, while education and subjective status were more important for relationships in higher SED countries (interaction terms p<0.05). CONCLUSION: Social relationships in persons with spinal cord injury are patterned according to individual SES and the countries' SED and larger socioeconomic structures partly moderate associations between individual SES and social relationships.

Inception cohort of the Swiss Spinal Cord Injury Cohort Study (SwiSCI): Design, participant characteristics, response rates and non-response.

OBJECTIVES: To provide a methodological reference paper for the inception cohort of the Swiss Spinal Cord Injury Cohort Study (SwiSCI), by detailing its methodological features and reporting on participant characteristics, response rates and non-response bias. DESIGN: Prospective cohort study starting in 2013 in all 4 specialized rehabilitation centres in Switzerland. SUBJECTS: Included are 655 newly diagnosed first rehabilitation patients aged ≥16 years with traumatic or non-traumatic spinal cord injury (TSCI, NTSCI). METHODS: Descriptive statistics were used to depict participant characteristics and to compare characteristics of responders and non-responders. Logistic regressions were conducted to estimate non-response bias. RESULTS: The sample consisted of 69% males, with mean age 53.5 years, 57.9% TSCI, 60.7% paraplegia and 78.8% incomplete SCI. Males and younger persons more often sustained TSCI and more severe SCI, resulting in longer duration of rehabilitation. Complete lesions were more prevalent in TSCI compared to NTSCI. The response rate was 47.5% and study participation was less likely in females, older persons, persons with lower functional independence and those with NTSCI. CONCLUSION: SwiSCI inception cohort data enable the estimation of epidemiological figures of SCI in Switzerland, and prognostic and trajectory modelling of outcomes after SCI to guide policy, service provision and clinical practice.

Labor market participation of individuals with spinal cord injury living in Switzerland: determinants of between-person differences and counterfactual evaluation of their instrumental value for policy.

STUDY DESIGN: Longitudinal, population-based survey. OBJECTIVE: To examine determinants of between-person differences in labor market participation of individuals with spinal cord injury (SCI) living in Switzerland and their potential importance for policy. SETTING: Community. METHODS: Longitudinal information on labor market participation (i.e., paid work or not) was obtained from 1198 and 1035 individuals of working-age participating in the 2012 and 2017 SwiSCI community survey, respectively. Determinants of between-person variation in labor market participation were examined using mixed effects logistic regression, controlling for within-person variation. Employment rates were predicted using counterfactual data for modifiable determinants. RESULTS: The employment rate was 56% for the 2012 and 61% for the 2017 survey. Labor market participation was affected mostly by static (sex, nationality, SCI severity), temporal (age), dynamic (education level, functional independence, chronic pain), and policy-related (general pension, disability pension level) determinants. Counterfactual (what-if) predictions indicated the highest improvement of employment rates for strategies that increase functional independence (up to 6% increase), foster education (5%), reduce chronic pain (2%), or promote a shift to partial disability pensions (15%). CONCLUSIONS: Between-person variation in labor market participation of persons with SCI is influenced by various temporal, static, dynamic, and policy-related determinants. Our results suggest that policy strategies aimed at enhancing the employment rate of the Swiss SCI population may particularly invest in programs promoting functional independence, education, and partial pension levels that are more adequate for ensuring sustainable employment.

Detecting subgroups in social participation among individuals living with spinal cord injury: a longitudinal analysis of community survey data.

STUDY DESIGN: Longitudinal community survey. OBJECTIVES: To determine subgroups in social participation of individuals living with spinal cord injury (SCI). SETTING: Community. METHODS: Data were collected in 2012 and 2017 as part of the community survey of the Swiss Spinal Cord Injury cohort. Participation was assessed using the 33-item Utrecht Scale of Evaluation of Rehabilitation-Participation evaluating frequency of, restrictions in and satisfaction with productive, leisure, and social activities. Linear mixed-effects model trees were used to distinguish subgroups in participation associated with sociodemographic and lesion characteristics. RESULTS: In all, 3079 observations were used for the analysis, of which 1549 originated from Survey 2012, 1530 from Survey 2017, and 761 from both surveys. Participants were mostly male (2012: 71.5%; 2017: 71.2%), aged on average 50 years (2012: 52.3; 2017: 56.5), with an incomplete paraplegia (2012: 37.5%; 2017: 41.8%) of traumatic origin (2012: 84.7%; 2017: 79.3%). There was limited within-person variation in participation over the 5-year period. Participation varied with age, SCI severity, education, financial strain, number of self-reported health conditions (SHCs), and disability pension level. Among modifiable parameters, the number of SHCs and disability pension level emerged as the most frequent partitioning variables, while education was most informative for participation in productive, leisure, and social activities. CONCLUSIONS: Long-term rehabilitation management and clinical practice should target people most prone to decreased participation in major life domains. Our study indicates that the alleviation of SHCs, engagement in further education, or adjusting disability pension level are promising areas to improve participation of persons living with SCI.

Psychosocial resources and chronic pain in individuals with spinal cord injury: evidence from the second Swiss national community survey.

STUDY DESIGN: Cross-sectional. OBJECTIVE: To investigate the associations of a set of psychosocial resources with pain and pain-related factors in individuals with spinal cord injury (SCI) and chronic pain. SETTING: Community, Switzerland. METHODS: Data from 1,064 individuals with chronic pain who participated in the second community survey of the Swiss Spinal Cord Injury Cohort Study (Survey 2017) were analyzed. Multiple linear regression modeling was performed to test the hypotheses that higher levels of psychosocial resources (self-efficacy, self-esteem, purpose in life, optimism, hope, social support, sense of belonging) are negatively associated with pain intensity, pain interference and depressive symptoms. RESULTS: Higher self-esteem, optimism and hope were related to less pain interference and all psychosocial resources under study were negatively associated with depressive symptoms in final models. However, neither of the psychosocial resources was related to pain intensity when models were adjusted for pain interference and depressive symptoms. CONCLUSIONS: These findings strengthen the evidence that psychosocial resources can have an impact on pain interference and depressive symptoms as pain-related factors, and support the notion that psychosocial resources might be promising targets for pain interventions in individuals with SCI.