[Reliability of the VIDA questionnaire for assessing instrumental activities of daily living (iADL) in the elderly].

OBJECTIVE

To analyse the inter- and intra-examiner reliability of the VIDA questionnaire, and their concordance with the "timed get up and go" test in people aged ≥75 years.

DESIGN

Descriptive study of a diagnostic test.

LOCATION

Primary Health Care. SUBJECTS-INTERVENTION: Application of 71 pairs of VIDA questionnaire, by one (38) or two professionals (33), in people aged ≥75 years with no significant sensory or physical-psychic impairment. Stratified sample based on ADL (Barthel index) to obtain a variety of responses that would ensure a range of scores of the questionnaire.

MAIN MEASUREMENTS

Overall score of VIDA questionnaire, "get up and go" test (functional), Pfeiffer questionnaire (cognitive), and risk factors of frailty (comorbidity, falls, recent hospitalisation, sensory disturbance, social impairment, polypharmacy).

RESULTS

Mean age 81.3 years±4.8, with a 65.5% moderate-severe change in Barthel index. The mean score of the questionnaire was 31.3±7.9, with a rank of 11 to 38 (maximum). There were no differences according to gender (P=0.78). Inter-examiner reliability (n 33): Intraclass Correlation Coefficient (ICC) 0.94, 95% Confidence Interval (CI) 0.88-0.97, P<0.0001. Intra-examiner reliability (n 38): ICC 0.96, CI 0.93-0.98, P<0.0001. Correlation coefficient (rho of Spearman) with the "get up and go" test (n 67) 0.61 (moderate), P<0.0001. Lower score if there are ≥ 2 frailty factors (P=0.015).

CONCLUSIONS

VIDA questionnaire is a very reliable tool, with no gender bias. It demonstrates an association with other functionality measures and with frailty factors in the elderly.