Reliability and construct validity of the Long Version of Disability Assessment for Dementia (Brazilian Version)

Canon, Mariana Boaro Fernandez; Silva, Fernanda Pinheiro da; Saviotti, Karen Rosângela Silva de Souza; Gélinas, Isabelle; Lemos, Naira de Fátima Dutra; Novelli, Marcia Maria Pires Camargo

doi:10.1590/2526-8910.ctoAO281936572

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Original Article • Cad. Bras. Ter. Ocup. 32 • 2024 • https://doi.org/10.1590/2526-8910.ctoAO281936572 copy

Reliability and construct validity of the Long Version of Disability Assessment for Dementia (Brazilian Version)

Confiabilidade e validade de construto da Escala de Avaliação de Incapacidade na Demência - Versão Longa (DADL-BR)

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Objectives

Evaluate the reliability test-retest (intra and inter-examiner) and construct validity of the Long Version of Disability Assessment for Dementia (Brazilian Version - DADL-BR).

Methods

The DADL-BR was applied to 58 caregivers/family of older adults with dementia. The inter-examiner (n = 30) and intra-examiner (n = 28) reliability was assessed using the kappa test and Pearson’s correlation coefficient, and the internal consistency was assessed using Cronbach’s alpha. The construct validity (n = 48) was performed by comparing DADL-BR with MMSE.

Results

The results of the intra and inter-examiner demonstrated good reliability (0.72 and 0.74), as well as nearly perfect correlations (0.99) for both inter- and intra-examiner reliability. The internal consistency was excellent (0.87) and the results demonstrated a good correlation (0.74) between DADL-BR and MMSE in construct validity analysis.

Conclusions

DADL-BR can be considered reliable instrument and with good construct validity, considering internal consistency and test-retest reliability and may be constitute a useful instrument for assessing the occupational performance profile of older adults with dementia.

Keywords:
Activities of Daily Living; Aged; Dementia; Reproducibility of Results; Validity of Tests

	Older Adults	Caregivers
N	58	58
Age	83.1 years (±7.5)	60.7 years (±16.2)
Sex	24 Males (41.4%)	16 Males (27.6%)
Sex	34 Females (58.6%)	42 Females (72.4%)
Education	1-4 years: 20 (34.5%)	1-4 years: 4 (6.9%)
	5-8 years: 4 (6.9%)	5-8 years: 3 (5.2%)
	9-11 years: 6 (10.3%)	9-11 years: 18 (31%)
	Above 12 years: 28 (48.3%)	Above 12 years: 33 (56.9%)

	N	Pearson	Kappa
Inter-examiner	30	0.99*	0.726^* * The correlation is significant at the 0.01 level (p < 0.01).
Intra-examiner	28	0.99*	0.743*

Domains	Total DADL-Br Score
Hygiene	0.93**
Dressing	0.80**
Continence	0.77**
Eating	0.69**
Functional mobility	0.66**
Personal device care	0.68**
Sexual activity	0.15
Rest and sleep	0.71**
Meal preparation	0.45**
Communication management	0.70**
Going on and outing	0.59**
Finance and correspondence	0.45**
Health maintenance	0.55**
Care of others	0.28^* * The correlation is significant at the 0.01 level (p < 0.05). **The correlation is significant at the 0.01 level (p < 0.01).
Care of pets	0.23
Leisure and housework	0.63**
Religious activity	0.41**
Education	0.55**
Work	0.08
Social participation	0.56**
*Cronbach’s alfa*	0.87

Domains of DADL-BR	MMSE total score
Hygiene	0.70**
Dressing	0.54**
Continence	0.61**
Eating	0.51**
Functional mobility	0.50**
Personal device care	0.58**
Sexual activity	0.07
Rest and sleep	0.49^ The correlation is significant at the 0.01 level (p < 0.01). 1Was used the Pearson’s correlation coefficient only for this analysis, and for the others, used the Spearman’s correlation coefficient. DADL-BR, Long Version of Disability Assessment for Dementia; MMSE, Mini-Mental State Examination.
Meal preparation	0.23
Communication management	0.61**
Going on and outing	0.52**
Finance and correspondence	0.62**
Health maintenance	0.48**
Care of others	0.23
Care of pets	0.09
Leisure and housework	0.26
Religious activity	0.25
Education	0.40**
Work	0.00
Social participation	0.45**
Total DADL-BR¹	0.74**

Versions	DAD (Original)	DAD-BR	DADL-BR
Inter-examiner reliability	0.95a	0.72b	0.72^b
Intra-examiner reliability	0.96^a	0.85^b	0.74^b
Inter-examiner correlation coefficient	—	0.92c	0.99d
Intra-examiner correlation coefficient	—	0.93^c	0.99^d
Internal consistency (Cronbach’s alpha)	0.96	0.77	0.87

Universidade Federal de São Carlos, Departamento de Terapia Ocupacional Rodovia Washington Luis, Km 235, Caixa Postal 676, CEP: , 13565-905, São Carlos, SP - Brasil, Tel.: 55-16-3361-8749 - São Carlos - SP - Brazil
E-mail: cadto@ufscar.br

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[1] Marcia Maria Pires Camargo Novelli e-mail: mnovelli@unifesp.br