Validity and Reproducibility of the Kaiser Physical Activity Survey in Pregnant Women

Abstract

0782 Physical activity patterns among pregnant women differ from patterns in non-pregnant women. Therefore, it is critical that epidemiologic studies of physical activity during pregnancy use instruments designed to capture multiple domains of physical activity (household/childcare, occupational, and sports/exercise). One such instrument is the Kaiser Physical Activity Survey (KPAS). However, the validity of the KPAS has not been assessed among pregnant women. PURPOSE: To assess the validity and reproducibility of the KPAS in pregnant women. METHODS: 53 women (mean age = 30.5 ± 7.1 years; 28% in 1st trimester, 32% in 2nd trimester, 40% in 3rd trimester) completed the KPAS and then wore the MTI actigraph for 7 consecutive days. At the end of the 7-day period, the KPAS was repeated. The MTI actigraph was used to generate two estimates of activity: 1) average counts per minute and 2) average minutes per day spent in activity (> 165 counts/min). RESULTS: The intraclass correlation coefficients used to measure reproducibility were 0.84 for total activity, 0.82 for sports and exercise, 0.74 for active living, 0.86 for household/care giving, and 0.93 for occupational activity. In terms of validity, the spearman correlations between the KPAS measure of total activity and the actigraph measures were 0.61 and 0.49 (for ‘average counts per minute’ and ‘average minutes per day spent in activity’, respectively). Correlations by activity type using ‘average counts per minute’ were 0.51 for sports/exercise, 0.43 for active living, 0.23 for household/care giving, and 0.27 for occupational activity. CONCLUSION: Our data indicate that the KPAS is a reliable instrument and provides a reasonably accurate measure of pregnancy physical activity. Supported by American Diabetes Association Career Award.