Adaptation and validations of Amsterdam instrumental activities of daily living questionnaire-short version for Peru.

BACKGROUND

Instrumental Activities of Daily Living (IADL) are key indicators of functional decline in dementia, but culturally adapted tools for Latin America are scarce.

OBJECTIVE

This study aims to assess the validity and robustness of a new Peruvian version of the Amsterdam Instrumental Activities of Daily Living Questionnaire-Short Version (A-IADL-Q-SV-P).

METHODS

We recruited 171 participants from a cognitive clinic in Peru (81 Clinical Dementia Rating (CDR) = 0, 70 CDR = 1, 20 CDR = 2), including 54 with Alzheimer's disease and 36 with frontotemporal dementia. Validity of the A-IADL-Q-SV-P was assessed using quadratic discriminant analysis to classify CDR level. Spearman correlations tested robustness with demographics (age, sex, education) and associations with cognitive (Mini-Mental State Examination), mood (Generalized Anxiety Disorder-7, Geriatric Depression Scale, and Neuropsychiatric Inventory), and functionality (Pfeffer Functional Activities Questionnaire and Technology-Activities of Daily Living Questionnaire) measures.

RESULTS

The A-IADL-Q-SV-P achieved excellent accuracy for classifying dementia severity (accuracy: 0.853, AUC > 0.92). The ability to classify normal cognition had a sensitivity of 0.95 and a specificity of 0.91, and results were similar for patients with Alzheimer's disease or frontotemporal dementia (accuracy > 0.88, sensitivity > 0.95, and specificity > 0.88, AUC > 0.91). We also found weak associations with age, sex, and education (|rho| < 0.2). Furthermore, the A-IADL-Q-SV-P had strong associations with other clinical scales (|rho| > 0.4), particularly in relation to cognition (rho = -0.70) and functionality (rho > 0.87).

CONCLUSIONS

A-IADL-Q-SV-P demonstrated excellent accuracy in classifying dementia severity, with strong correlations to cognitive and other functionality measures. This supports the utility of A-IADL-Q-SV-P as a culturally adapted tool for assessing functional decline in dementia.