covariates At the 10-year follow-up, BP, height, weight, and age (in months)data were collected during a physical examination. The height and weight measurements were used to calculate body mass index(BMI). Resting systolic and diastolic BP were measured twice in a sitting position from the right arm after five minutes rest. The elbow was relaxed at heart level to store (slightly bent) and the upper arm was bare during testing. A second measurement was taken after sitting for two minutes.