Psychometric properties of the modified RESIDE physical activity questionnaire among low-income overweight women.
OBJECTIVE
This study explored the criterion-related validity and test-retest reliability of the modified RESIDential Environment physical activity questionnaire and whether the instrument's validity varied by body mass index, education, race/ethnicity, or employment status.


METHODS
Validation study using baseline data collected for randomized trial of a weight loss intervention.


METHODS
Participants recruited from health departments wore an ActiGraph accelerometer and self-reported non-occupational walking, moderate and vigorous physical activity on the modified RESIDential Environment questionnaire. We assessed validity (n=152) using Spearman correlation coefficients, and reliability (n=57) using intraclass correlation coefficients.


RESULTS
When compared to steps, moderate physical activity, and bouts of moderate/vigorous physical activity measured by accelerometer, these questionnaire measures showed fair evidence for validity: recreational walking (Spearman correlation coefficients 0.23-0.36), total walking (Spearman correlation coefficients 0.24-0.37), and total moderate physical activity (Spearman correlation coefficients 0.18-0.36). Correlations for self-reported walking and moderate physical activity were higher among unemployed participants and women with lower body mass indices. Generally no other variability in the validity of the instrument was found. Evidence for reliability of RESIDential Environment measures of recreational walking, total walking, and total moderate physical activity was substantial (intraclass correlation coefficients 0.56-0.68).


CONCLUSIONS
Evidence for questionnaire validity and reliability varied by activity domain and was strongest for walking measures. The questionnaire may capture physical activity less accurately among women with higher body mass indices and employed participants. Capturing occupational activity, specifically walking at work, may improve questionnaire validity.
Department of Epidemiology, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, United States.
Sydney A
SA
Jones
Department of Epidemiology, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, United States. Electronic address: kelly_evenson@unc.edu.
Kelly R
KR
Evenson
UNC Center for Health Promotion and Disease Prevention, The University of North Carolina at Chapel Hill, United States.
Larry F
LF
Johnston
School of Human Movement Studies, The University of Queensland, Australia.
Stewart G
SG
Trost
Department of Nutrition, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, United States.
Carmen
C
Samuel-Hodge
School of Arts and Sciences, Johnson & Wales University Charlotte Campus, United States.
David A
DA
Jewell
Department of Medicine and Public Health Sciences, Penn State College of Medicine, United States.
Jennifer L
JL
Kraschnewski
Department of Medicine, School of Medicine, The University of North Carolina at Chapel Hill, United States.
Thomas C
TC
Keyserling
D061725:Accelerometry; D015992:Body Mass Index; D004522:Educational Status; D004651:Employment; D005260:Female; D006801:Humans; D008875:Middle Aged; D009043:Motor Activity; D050177:Overweight / Q000523:psychology*; D011203:Poverty; D011594:Psychometrics; D044469:Racial Groups; D015203:Reproducibility of Results; D057566:Self Report; D011795:Surveys and Questionnaires; D016138:Walking
Accelerometer; Obesity; Physical activity assessment; Reliability; Validity