Article

OBJECTIVE: To develop and validate a functional measure, the Movement and
Activity in Physical Space (MAPS) score, that encompasses both physical activity
and environmental interaction. DESIGN: Observational matched-pair cohort with
2-month follow-up. SETTING: General community under free-living conditions.
PARTICIPANTS: Adult participants (N=18; n=9 postsurgical, n=9 matched control;
mean age +/- SD, 28.9 +/- 12.0y) were monitored by an accelerometer and global
positioning system receiver for 3 days within 1 week (4.1 +/- 2.8d) after knee
surgery (T=0) and 2 months later (T+2). The healthy controls were matched for
age, sex, smoking, perceived physical activity level, and occupation of a
postsurgical participant. Correlation, t test (with Bonferroni adjustment:
alpha=.05/2), analysis of variance, and intraclass correlation coefficient were
used to establish validity and reliability evidence. INTERVENTIONS: Not
applicable. MAIN OUTCOME MEASURE: MAPS scores. RESULTS: MAPS scores were
moderately correlated with the Knee Injury and Osteoarthritis Outcome Score
(P<.05). There was a significant group difference at T = 0 for MAPS
(t(9.9)=-3.60; P=.01). Analysis of variance results for the MAPS indicated a time
and group interaction (F(1,12)=4.60, P=.05). Reliability of 3 days of MAPS scores
ranged from 0.75 to 0.81 (postsurgical and control), and 2-month test-retest
reliability in the control group was 0.94. CONCLUSIONS: The results provide a
foundation of convergent and known-group difference validity evidence along with
reliability evidence for the use of MAPS as a functional outcome measure.
CI - Copyright (c) 2011 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS