Validation of the Kaiser Physical Activity Survey in Pregnant Women

Purpose Participation in physical activity during pregnancy may reduce the risk of maternal and fetal disorders. However, few studies have validated physical activity questionnaires for use during pregnancy, a time characterized by different patterns of activity than non-pregnancy. Therefore, the aim of this study was to assess the validity and reliability of the Kaiser Physical Activity Survey (KPAS) for use during pregnancy.

Methods The KPAS, adapted from the Baecke physical activity survey, was designed specifically to assess physical activity in women. Unique features of the KPAS include the assessment of multiple domains of physical activity (household/care giving, occupational, active living, and spoils/exercise) as well as total activity Summary KPAS indices were compared with objective (ActiGraph accelerometer by ActiGraph LLC) and subjective (Pregnancy Physical Activity Questionnaire (PPAQ)) measures of physical activity. Participants completed the self-administered PPAQ followed by the interviewer-administered KPAS and then wore the accelerometer for the following 7-d. At the end of the 7-d period, the questionnaires were repeated.

Results Intraclass correlation coefficients used to measure reproducibility of the KPAS were r = 0.84 for total activity and ranged from r = 0.76 for active living activities to r = 0.86 for occupational activity. Spearman correlations between the KPAS and three published cut points used to classify accelerometer data ranged from r = 0.49-0.59 for total activity, r = 0.12-0.26 for household/care giving, r = 0.26-0.33 for occupational activity, r = 0.31-0.36 for active living, and r = 0.34-0.51 for sports/exercise. Spearman correlations between the KPAS and the PPAQ ranged from r = 0.71 for household/care giving to r = 0.84 for sports/exercise.

Conclusions The KPAS is a reliable and reasonably accurate instrument for estimating physical activity among pregnant women.

Link to Abstract: http://www.ncbi.nlm.nih.gov/pubmed/16394952