Detecting longitudinal changes in activities of daily living (ADL) dependence: Optimizing ADL staircase response choices

Research output: Contribution to journalArticle

Standard

Harvard

APA

CBE

MLA

Vancouver

Author

RIS

TY - JOUR

T1 - Detecting longitudinal changes in activities of daily living (ADL) dependence

T2 - British Journal of Occupational Therapy

AU - Axmon, Anna

AU - Ekstam, Lisa

AU - Slaug, Björn

AU - Schmidt, Steven M.

AU - Fänge, Agneta Malmgren

PY - 2019

Y1 - 2019

N2 - Introduction: Using a sum score based on a three-graded response scale for the activities of daily living staircase has previously been found to increase the statistical power compared to dichotomized responses when assessing longitudinal changes in activities of daily living. We aimed to investigate if the statistical power could be further increased by using a four-graded scale. Methods: We used data from two previous studies on community-living people to calculate sum scores based on a dichotomized (independent/dependent), a three-graded (independent/partly dependent/dependent), and a four-graded (independent without difficulty/independent with difficulty/partly dependent/dependent) response scale for the activities of daily living staircase. In total, 1818 paired observations (baseline to follow-up) from 482 people were included. Statistical power was estimated for the entire material as well as stratified by follow-up time and baseline activities of daily living using simulations. Results: The four-graded scale provided the highest statistical power, particularly for shorter follow-up times and low and high baseline activities of daily living, but had similar statistical power to the three-graded scale for longer follow-up times and medium baseline activities of daily living. Conclusion: Adding a second level to “independent” in the activities of daily living staircase improved the detection of changes over time.

AB - Introduction: Using a sum score based on a three-graded response scale for the activities of daily living staircase has previously been found to increase the statistical power compared to dichotomized responses when assessing longitudinal changes in activities of daily living. We aimed to investigate if the statistical power could be further increased by using a four-graded scale. Methods: We used data from two previous studies on community-living people to calculate sum scores based on a dichotomized (independent/dependent), a three-graded (independent/partly dependent/dependent), and a four-graded (independent without difficulty/independent with difficulty/partly dependent/dependent) response scale for the activities of daily living staircase. In total, 1818 paired observations (baseline to follow-up) from 482 people were included. Statistical power was estimated for the entire material as well as stratified by follow-up time and baseline activities of daily living using simulations. Results: The four-graded scale provided the highest statistical power, particularly for shorter follow-up times and low and high baseline activities of daily living, but had similar statistical power to the three-graded scale for longer follow-up times and medium baseline activities of daily living. Conclusion: Adding a second level to “independent” in the activities of daily living staircase improved the detection of changes over time.

KW - Activities of daily living

KW - data interpretation

KW - occupational therapy

KW - statistical longitudinal studies

UR - http://www.scopus.com/inward/record.url?scp=85067842342&partnerID=8YFLogxK

U2 - 10.1177/0308022619853513

DO - 10.1177/0308022619853513

M3 - Article

JO - British Journal of Occupational Therapy

JF - British Journal of Occupational Therapy

SN - 1477-6006

ER -