Maria Helena Morgani de Almeida, Rosé Colom Toldrá, Marina Picazzio Perez Batista, Ana Cristina Fagundes Souto; Reliability and Validity of the Brazilian Version of the Late-Life Function and Disability Instrument. Am J Occup Ther 2016;70(2):7002290050. https://doi.org/10.5014/ajot.2016.017624
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© 2021 American Occupational Therapy Association
OBJECTIVE. We evaluated the test–retest reliability, internal consistency, and construct validity of the Brazilian version of the Late-Life Function and Disability Instrument.
METHOD. A sample of 118 older adults provided data for testing construct validity and internal consistency, and 14 provided data for testing test–retest reliability. Factor analysis with varimax rotation was used to assess construct validity.
RESULTS. The Function component had excellent test–retest and total internal consistency reliability. Factor analysis revealed that the Upper Extremity Function and Advanced Lower Extremity Function domains were similar to the original analysis. The Disability component showed adequate to excellent test–retest reliability, except in the Management role; total internal consistency was excellent. Factor analysis revealed that its domains were similar to the original analysis, except for some items.
CONCLUSION. The Late-Life Function and Disability Instrument is recommended for assessment of Brazilian community-dwelling older adults who are functionally independent and who do not require mobility assistance.
The LLFDI is based on the ICF, a relevant and holistic model used by rehabilitation professionals in clinical practice and research (Pettersson, Pettersson, & Frisk, 2012). The ICF’s influence on the development of the LLFDI confers multidisciplinary relevance, fostering communication among health care professionals.
The LLFDI can be broadly applied in clinical occupational therapy practice to evaluate a broad range of daily activities.
The Function component assesses functioning across a wide variety of daily activities involving both the upper and lower limbs. Functional evaluation, one of the pillars of occupational therapy (Doucet & Gutman, 2013), is especially relevant for older adult clients because aging affects functioning, autonomy, and independence (WHO, 2002).
The Disability component of the LLFDI includes a wide variety of roles and addresses both frequency and perceived limitations in performing life tasks. The LLFDI can be used to identify changes in disability (Jette, Haley, & Kooyoomjian, 2002).
The findings of this study regarding the reliability and construct validity of the LLFDI–Br confirm its appropriateness for use with older adults, making it a valuable addition to validated instruments available in Brazilian Portuguese for use by occupational therapy practitioners (Chaves et al., 2010).
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