Cross-cultural adaptation and validation of the Job Content Questionnaire (JCQ-22).

BACKGROUND: Although the Job Content Questionnaire (JCQ-22) has been translated into numerous languages and applied in various countries, its cultural applicability in China remains unclear. OBJECTIVE: To adjust the JCQ-22 for cross-cultural use and optimize the scoring method for suitability for Chinese working populations. METHODS: We first used the original JCQ-22 questionnaire to measure occupational stress. Cross-cultural adjustment involved reorganization of scale items (adjusted-I scale) and deletion of inefficient redundant items during reorganization of scale items (adjusted-II scale). Structural validity and the relationship between stress and health outcomes (insomnia and self-conscious symptoms) before and after adjustment were compared. RESULTS: Exploratory factor analysis revealed that the two-factor cumulative variance contribution rate of job demand and control of the adjusted-II scale was 52.47%, compared with 48.44% and 48.44% in the original version and adjusted-I scale, respectively. Among the 16 fitness indicators in confirmatory factor analysis, 9 items of the adjusted-II scale met the standard, compared with 4 items of the original and adjusted-I scales. The Pearson's correlation coefficients between occupational stress and insomnia as well as self-conscious symptoms from the adjusted-II scale were 0.15 and 0.32, respectively, which were higher than those of the original scale (0.10 and 0.20). Receiver operating characteristic analysis revealed that the adjusted-II scale exhibited a better area under the curve and Youden index values than the original scale. CONCLUSION: The adjusted-II scale exhibited superior structural validity with more reasonable health outcome predictions and fewer items, making it more suitable for measuring occupational stress in Chinese populations.

Influence of Workload, Personality, and Psychological Flexibility on Occupational Stress Among Medical Staff: A Fuzzy-Set Qualitative Comparative Analysis.

Objective: During the COVID-19 pandemic, the occupational stress of medical staff has been a major issue. This study aimed to suggest a new strategy to identify high-risk factor sets of occupational stress in medical staff using fuzzy-set qualitative comparative analysis (fs-QCA) and provide ideas for the prevention and intervention of occupational stress. Methods: A total of 1,928 medical staff members were surveyed and tested using the Acceptance and Action Questionnaire-II (AAQ-II), Occupational Stress Inventory-Revised edition (OSI-R), and Eysenck Personality Questionnaire-Revised Short Scale (EPQ-RSC). The fs-QCA was used to explore the high-risk factors for occupational stress among medical staff. Results: The psychological strain (PSY) score of the medical staff was 26.8 ± 7.13, and the physical strain (PHS) score was 24.3 ± 6.50. Low psychological flexibility score-introversion-high role overload, introversion-neuroticism-high role overload, and low psychological flexibility score-neuroticism were high-risk factor sets for PSY. Low psychological flexibility score-introversion-high role overload, low psychological flexibility score-introversion-neuroticism, low psychological flexibility score-neuroticism-high role overload, low psychological flexibility score-psychoticism-neuroticism, and psychoticism-neuroticism-high role overload were high-risk factor sets for PHS. Conclusion: There are different combinations of high-risk factors for occupational stress among the medical staff. For occupational stress intervention and psychological counseling, targeted and individualized health intervention measures should be implemented according to specific characteristic combinations of different individuals.

Relevance of Physical Activities, Sedentary Behaviors, and Genetic Predisposition in Body Fatness: Population-Based Study on Chinese Adults.

INTRODUCTION: Little attention has been paid to the interacting effect of specific intensities of physical activities (PAs) and sedentary lifestyle, like television watching, and genetic predisposition on body composition indices among Chinese adults. Herein, we aimed to examine whether specific types of PAs and sedentary behaviors (SBs) were associated with body composition indices among Chinese adults and to further explore whether these associations interacted with the genetic predisposition to high BMI. METHODS: Cross-sectional data regarding PAs and time spent on SBs and dietary intake of 3,976 Chinese adults (54.9% women) aged 25-65 years in Southwest China were obtained via questionnaires in 2013-2015. Weight, height, and waist circumference (WC) were measured, and BMI, percentage of body fat (%BF), fat mass index (FMI), and fat-free mass index (FFMI) of the participants were calculated. Genetic risk score (GRS) was calculated on 9 established BMI-associated SNPs among Chinese adults. RESULTS: When the participants were stratified by GRS for BMI, significant associations were only found for adults with high GRS for BMI: moderate-to-vigorous physical activity (MVPA) was negatively associated with WC and %BF and positively related to FFMI. The adjusted positive relationship of time spent watching television with BMI, WC, %BF, and FMI were also just found between adults with high weighted GRS for high BMI: for every 1 h increment in television watching, the BMI, WC, %BF, and FMI of the participants increased by 0.2 kg/m2, 0.9 cm, 0.3%, and 0.1 kg/m2, respectively (p < 0.02). CONCLUSION: MVPA may be a protective factor against obesity, and prolonged television watching may accentuate adiposity. These putative effects may be more pronounced among individuals with a high genetic risk of a high BMI.

Monetary diet cost is positively associated with diet quality and obesity: an analysis of school-aged children in Southwest China.

BACKGROUND: Little is known about the relationships between diet cost, dietary intake and obesity in Chinese populations. This study explored how diet cost was related to diet quality and obesity among school-aged children in Southwest China. METHODS: Data from a cross-sectional study was analysed. Diet cost was estimated based on dietary intake assessed with 24-h dietary recalls and retail food prices. Diet quality was measured using the Chinese Children Dietary Index. Body height, weight, waist circumference and skinfold thicknesses were measured, and their body mass index standard deviation score (BMISDS), waist-to-height ratio (WHtR), fat mass index (FMI) and fat-free mass index (FFMI) were calculated. Multivariate regression models were used to explore the relevance of diet cost to diet quality and obesity. RESULTS: After adjustment for potential confounders, a positive association was observed between diet quality and energy-adjusted diet cost (ß = 0.143, 95% confidence interval, CI: 0.014-0.285, Pfor-trend = 0.0006). Energy-adjusted diet cost also showed a positive association with FMI (ß = 0.0354, 95% CI: 0.0001-0.0709, Pfor-trend = 0.01), BMISDS (ß = 0.0200, 95% CI: 0.0006-0.0394, Pfor-trend = 0.002) and WHtR (ß = 0.0010, 95% CI: 0.0003-0.0017, Pfor-trend = 0.02). CONCLUSIONS: Energy-adjusted diet cost was independently and positively associated with diet quality and obesity among Chinese school-aged children.

[Effect of nocturnal sleep duration and daytime napping on overweight/obesity among adults in Chengdu City].

OBJECTIVE: To examine whether nocturnal sleep duration and daytime napping are related to overweight/obesity among adults in Chengdu City. METHODS: A total of 1276 adults( women 823, men 453) aged 20-70 years were selected by randomized cluster sampling in 2015. The sleep duration rounded up to the hour was determined according to the answer to the question, "How much time do you usually sleep per night?", the nap time of subjects were collected according to the answer by the question, "How many days do you have a nap in a week?". Height and weight were measured to calculate body massindex. Logistic regression models were used to estimate the odd ratio( OR) and 95%confidence interval( 95% CI) of overweight/obesity. RESULTS: Approximately 66. 38% of subjects had daytime napping habit. After adjustment for potential confounders, OR( 95% CI) of overweight/obesity was 0. 69( 0. 54 - 0. 88) for nap takers compared with individuals without daytime napping habit. One nap increase in a week was associated with-0. 20, -0. 13 BMI in young adults and middle-aged adults. Very short nocturnal sleep duration( < 6 hours) and short nocturnal sleep duration( 6-6. 9 hours) was significantly associated with an increased risk of overweight/obesity among middle-aged adults OR = 2. 11( 95% CI 1. 20-3. 76), OR = 1. 93( 95% CI 1. 13-3. 34). CONCLUSION: The frequency of daytime napping was negative associated with BMI among young and middle-aged adults. Short nocturnal sleep duration was associated with higher risk of overweight/obesity among middle-aged adults in Chengdu.

Dietary Protein Intake, Meat Consumption, and Dairy Consumption in the Year Preceding Pregnancy and During Pregnancy and Their Associations With the Risk of Gestational Diabetes Mellitus: A Prospective Cohort Study in Southwest China.

Background: Gestational diabetes mellitus (GDM) has become a public health problem in China. Objective: To examine the association of dietary protein intake before and during pregnancy with the risk of GDM. Design: Dietary intake before pregnancy and during the first and second trimesters of pregnancy was assessed using food frequency questionnaires in a prospective cohort of pregnant women. To screen GDM, participants underwent an OGTT test during 24-28 weeks of gestation. Cox proportional hazards were used to estimate RRs and 95% CIs for the associations between tertiles of dietary protein and the source of protein intake in different time windows with GDM status. Results: Higher intake of total protein [RR (95% CI): 1.92 (1.10-3.14), p for trend = 0.04] or animal protein [1.67 (1.19-2.93), p for trend = 0.03] in mid-pregnancy was associated with higher risk of GDM. Vegetable protein intake before or during pregnancy was not related to GDM risk (p for trend > 0.05). Moreover, in the mid-pregnancy, participants with higher meat consumption or dairy consumption had a higher risk of GDM. Conclusion: Our study indicated that higher dietary intakes of total protein and animal protein in mid-pregnancy were associated with an increased risk of GDM among pregnant Chinese women.

[Eating Frequency and Gestational Weight Gain and Its Association with Birth Body Mass of Neonates: a Birth Cohort Study].

OBJECTIVE: To determine the association of eating frequency (EF) and gestational weight gain (GWG) with birth body mass of neonates. METHODS: A prospective cohort study was conducted on 578 healthy pregnant women from April to October 2015. Dietary intake and physical activity data per trimester were collected using a questionnaire. Data in relation to gestational body mass,gestational stage and birth body mass of neonates were obtained from clinical records. Multiple logistic regression models were established to test the impacts of EF and GWG on appropriate for gestational age (AGA). Multiple linear regression analyses were performed to determine the association between EF and birth body mass of neonates. RESULTS: A final sample of 503 eligible pregnant women (87.02%) was included in data analyses. Higher EF [odds ratio (OR)=2.03; 95% confidence interval (CI): 1.18-3.47] and snacks (OR=1.84; 95%CI: 1.08-3.15) in the first trimester were associated with increased risk of excessive GWG,after controlling for maternal age,education,average household income,physicalactivity,numbers of pregnancy,numbers of delivery,and dietary intake (protein,fat,carbohydrate). A meal frequency greater (OR=2.83; 95%CI: 1.07-4.58) or less (OR=1.92; 95%CI: 1.08-3.61) than three in the first trimester was also associated with increased risk of large or small for gestational age. Meal frequency in the first trimester was positively correlated with birth body mass of neonates (ß=236.17; P<0.01). CONCLUSION: Frequent eating and snacks in the first trimester are associated with increased risks of excessive GWG. Meal frequency in the first trimester is also positively correlated with birth body mass of neonates: three meals per day is a protective factor of AGA.

Dietary energy density is positively associated with body composition of adults in Southwest China.

OBJECTIVE: Dietary energy density (ED) might have influences on body composition. We therefore examined whether ED is associated with body composition among Chinese adults. DESIGN: We collected dietary data through validated two-day 24 h recalls. ED, defined as the amount of energy per unit weight of food consumed, was calculated based on five methods. Multiple linear regression analyses were performed to explore the associations between ED and body composition parameters, including BMI, fat mass index (FMI), fat-free mass index (FFMI), percentage body fat (%BF) and waist circumference (WC). SETTING: Southwest China. SUBJECTS: Chinese adults (n 1933) in 2013. RESULTS: After adjusting the covariates, all ED definitions were positively associated with BMI, FMI, FFMI, %BF and WC among women (P<0·01). In men, however, ED with foods only was positively associated with BMI, FMI, FFMI and %BF (P<0·05), but not with WC (P=0·07); we also found null associations between ED with foods and all beverages and body composition among men. Additionally, ED contributed to higher increases of body composition in women than in men (P<0·01). CONCLUSIONS: The present study supports the positive association between ED and body composition among adults in Southwest China, in which beverages may play an important role.

High protein intake along with paternal part-time employment is associated with higher body fat mass among girls from South China.

PURPOSE: Protein intake has been suggested to be associated with body composition among western children. Our aim was to determine whether protein intake is associated with body composition among Chinese children and to investigate whether parental socioeconomic status modifies these associations. METHODS: Cross-sectional data were collected from the baseline survey of an ongoing population-based prospective open cohort study conducted in 2013. In this survey, 2039 children in South China were recruited using cluster random sampling. Information of 1704 children (47% girls), aged 7-12 years from three primary schools (42 classes), on diet and anthropometry was included finally. Their daily protein intake was obtained by 3-day 24-h dietary recalls. Skinfold thickness, body height, and weight were measured to calculate percent body fat (%BF), fat mass index (FMI), and fat-free mass index (FFMI). Parental characteristics were collected by questionnaires. RESULTS: Among girls, protein intake was positively associated with %BF and FMI [estimate (SE) for %BF: 0.007 (0.003), p = 0.04; for FMI: 0.092 (0.002), p = 0.03], adjusted for pubertal stage, breast-feeding, maternal overweight, carbohydrate intake, energy intake, and physical activity level. Furthermore, there was interaction between paternal occupation and the relations of dietary protein with %BF and FMI (p for interaction ≤ 0.04). None of the associations between protein intake and %BF, FMI, or FFMI was found among boys. CONCLUSIONS: Our data indicate that school-aged girls, but not boys, living in South China with higher dietary protein intake might have higher body fat mass, which could be modified by paternal occupation.

Television Watching and Telomere Length Among Adults in Southwest China.

OBJECTIVES: To explore the independent associations of sedentary behavior and physical activity with telomere length among Chinese adults. METHODS: Data on total time of sedentary behavior, screen-based sedentary behavior (including television watching and computer or phone use), moderate to vigorous physical activity, and dietary intake of 518 adults in Chengdu, Guizhou, and Xiamen in China (54.25% women) aged 20 to 70 years were obtained between 2013 and 2015 through questionnaires. Height, weight, and waist circumference were measured to calculate body mass index and percentage of body fat. Telomere length was measured through Southern blot technique. RESULTS: Television watching was inversely related to adjusted telomere length (-71.75 base pair; SE = 34.40; P = .04). Furthermore, a similar trend between telomere length and television watching was found in the group aged 20 to 40 years after adjusting for all covariates. Adults aged 20 to 40 years in the highest tertile of daily time spent on watching television had 4.0% shorter telomere length than adults in the lowest tertile (P = .03). CONCLUSIONS: Although the association is modest, television watching is inversely related to telomere length among Chinese adults, warranting further investigation in large prospective studies.

Sedentary Behavior Is Independently Related to Fat Mass among Children and Adolescents in South China.

We aim to explore the independent associations of sedentary behaviors (SB) with body mass distribution among Chinese children. Data on the screen-based sedentary time (television viewing and computer use) and doing homework, physical activities and dietary intake of 1586 Chinese children (50.3% girls) aged 7-15 years were obtained through validated questionnaires. Skin-fold thickness, body height, and weight were measured to calculate percent body fat (%BF), fat mass index (FMI), and fat-free mass index (FFMI). Parental characteristics were collected by questionnaires. Among girls, time of SB (screen time or doing homework) was positively related to %BF, FMI, and FFMI (p < 0.03) after adjusting for maternal overweight, the average annual income of family, moderate-to-vigorous physical activity energy expenditure, and energy intake: Girls in the highest tertile of screen time/homework had 16.7%/23.3% higher relative FMI and 2.9%/2.9% higher relative FFMI than girls in the lowest tertile. Among boys, screen time was positively associated with FFMI (p < 0.003), but not related to %BF and FMI (p > 0.09), while time of doing homework was positively related to %BF and FMI (p = 0.03). Sedentary behaviors might be positively and independently related to fat mass among Chinese children, and were more pronounced in girls.