Activities and participation after stroke: validity and reliability of the Turkish version of IMPACT-S questionnaire

Objective:This study aims to translate the screener part of the The International Classification of Functioning, Disability and Health (ICF) Measure of Participation and ACTivities Questionnaire (IMPACT-S) into Turkish and to test its reliability and validity in Turkish patients with stroke. Materials and methods:Participants were recruited from the inpatient rehabilitation clinic of a university hospital. Eighty-six stroke patients (mean ages: 60.43 +/- 12.62 years; range 20-82 years; 51 males and 35 females) were included in the study. Demographic properties of the patients (age, sex, education, occupation, and body mass index), the start of in-patient rehabilitation treatment, affected extremity, types of stroke, and comorbidities were recorded. After that IMPACT-S questionnaire and World Health Organization Disability Assessment Schedule-II (WHODAS-II) were used for data collection. A test-retest interval of 7 d was used to assess the reliability. Internal consistency between the items was assessed by Cronbach's alpha coefficient. For reliability; test-retest reliability, intraclass correlation coefficient (ICC), paired samplet-test were used. Intercorrelation of variables was performed with Spearman'srhotests. Results:Totally 86 patients completed test/retest procedures. Cronbach's alpha coefficient of the questionnaire was found to be 0.96. Both internal consistency (Cronbach's alpha score range: 0.65-0.98) and test-retest reliability (ICC values range: 0.86-0.97) of the IMPACT-S were found to be good. The correlations between all IMPACT-S subscales were moderate to strong (correlation range: 0.45-0.80). The correlation between the Activities and Participation scores (0.86) and IMPACT-S total score (0.96) were very strong. Statistically significant negative correlations were detected between all sub-scores of IMPACT-S and WHODAS-II, except for life activities/communication and life activities/knowledge. These findings show excellent concurrent validity. However, a lower-than-expected correlation between Major life areas (IMPACT-S) and Life activities (WHODAS-II) was observed. Conclusion:The Turkish version of the IMPACT-S is a valid and reliable questionnaire for evaluating activities and participation in patients with stroke.