Frequently repeated measurements -our experience of collecting data with SMS.

BACKGROUND: As technology is advancing, so are the possibilities for new data collection methods in research, potentially improving data quality and validity of the results. In Sweden, a system using frequent repeated data collection using text messages, SMS Track, has been used in clinical research for more than a decade. In this paper, compliance with repeated text message questions was examined across five different studies, i.e. if compliance was 1: associated with study-specific factors (age or gender of the subjects, the condition, its' severity or course, i.e. improvement, relapse or steady state) and/or. 2: associated with the methodology itself (the question being asked, the frequency and number of questions, duration of data collection, initial compliance or the management of the system). METHODS: Descriptive comparisons were done across five studies. Three studies were collecting weekly responses over at least 52 weeks ("Weekly studies") and were used to investigate the effect of age, sex and pain severity on compliance, the effect of early compliance for late compliance, and finally the early occurrence of two successive weeks with non-compliance. RESULT: Compliance was excellent across all five studies, and only influenced somewhat by age, sex and pain-level. The factor "study" remained significant in the final model thus the observed differences may be a result of the conditions studied but does not seem to be attributable to severity or development of these conditions. Number and frequency of questions did not influence compliance, nor did study duration. CONCLUSIONS: Compliance was excellent in the included studies and was not affected by population factors. However, differences in compliance were observed that cannot be easily explained and warrant further investigation. In particular, the nature of the variables or the management of the study are potential areas for further investigations.

Concerns about falling in wheelchair users with spinal cord injury--validation of the Swedish version of the spinal cord injury falls concern scale.

OBJECTIVE: Translation of the Spinal Cord Injury Falls Concern Scale (SCI-FCS); validation and investigation of psychometric properties. DESIGN: Translation, adaptation and validation study. SUBJECTS/PATIENTS: Eighty-seven wheelchair users with chronic SCI attending follow-up at Rehab Station Stockholm/Spinalis, Sweden. METHODS: The SCI-FCS was translated to Swedish and culturally adapted according to guidelines. Construct validity was examined with the Mann-Whitney U-test, and psychometric properties with factor and Rasch analysis. RESULTS: Participants generally reported low levels of concerns about falling. Participants with higher SCI-FCS scores also reported fear of falling, had been injured for a shorter time, reported symptoms of depression, anxiety and fatigue, and were unable to get up from the ground independently. Falls with or without injury the previous year, age, level of injury, sex and sitting balance did not differentiate the level of SCI-FCS score. The median SCI-FCS score was 21 (range 16-64). Cronbachs alpha (0.95), factor and Rasch analysis showed similar results of the Swedish as of the original version. CONCLUSION: The Swedish SCI-FCS showed high internal consistency and similar measurement properties and structure as the original version. It showed discriminant ability for fear of falling, time since injury, symptoms of depression or anxiety, fatigue and ability to get up from the ground but not for age, gender or falls. Persons with shorter time since injury, psychological concerns, fatigue and decreased mobility were more concerned about falling. In a clinical setting, the SCI-FCS might help identifying issues to address to reduce the concerns about falling.