The purposes of the present study were to analyze the stability of biological risk factors for CVD (blood pressure [BP], percentage of fat mass [%FM], total cholesterol [TC]) and one behavioral/life style risk factor (physical activity [PA]), as well as to study the stability of biological risk factors clustering. The sample comprised 325 males and 367 females, aged 8-15 years old. Participants were classified as being “at risk” according to age and sex adjusted 4th quartile or the first for PA. Three biological risk factors (%FM, SBP and TC) showed higher stability (one-year interval; r = 0.9–0.5) than DBP (r = 0.3) and PAI (r = 0.3). It can be concluded that 46% of subjects with two and/or three biological risk factors at the first measurement remained with the same number of biological risk factors in the second measurement.
S. Guerra, J.C. Ribeiro, J. Oliveira, J.A. Duarte, and J. Mota are with the Research Centre in Physical Activity, Health and Leisure, Faculty of Sports Science and Physical Education, University Of Porto, Portugal; A. Teixeira-Pinto is with the Department of Biostatistics and Medical Information, Faculty of Medicine, University of Porto, Portugal; and J.W.R. Twisk is with the Department of Clinical Epidemiology and Biostatistics, Vu University Medical Centre, Amsterdam, The Netherlands.