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Abstract
The objective of the study was to investigate the factorial validity and internal consistency of the Instrumental Activities of Daily Living (IADL) Profile. A group of 96 patients aged 16 to 65 years, with moderate to severe traumatic brain injuries, was recruited from 12 rehabilitation hospitals in Quebec. The IADL Profile was administered by an occupational therapist in each subject's home and community environment. Principal axis factoring and confirmatory factor analysis provide preliminary support for six correlated factors (F): (F1) going to grocery store/shopping for groceries, (F2) having a meal with guests/cleaning up, (F3) putting on outdoor clothing, (F4) obtaining information, (F5) making a budget, (F6) preparing a hot meal for guests. Total explained variance was 73.6%. Cronbach's alpha analysis revealed high to very high internal consistency for all scales ranging from .81 to .98; internal consistency of the total scale was very high (0.95). The findings suggest that the IADL Profile is a promising means of documenting both IADL independence and the repercussions of executive function deficits on everyday tasks in real-world environments.
The authors would like to thank Mariama Touré and Caroline Lachapelle for their assistance with data collection and Julie Lamoureux for completing the data analysis. We would also like to thank all participating rehabilitation centres who recruited subjects for this study. The research reported here was supported by an operating grant awarded to the authors by the Fonds de la recherche en santé du Québec, the Association des hôpitaux du Québec, the Association des établissements de réadaptation du Québec, the Société d'assurance automobile du Québec, and the Quebec Rehabilitation Research Network (grant no. 6623).