Video instructions improve accuracy of self-measures of waist circumference compared with written instructions.

Objective: To determine whether video-based instructions improve the accuracy of self-measures of waist and hip circumference compared with written instructions.

Design: Population-based, cross-sectional study. Self-measurements of waist circumference (WC) and hip circumference (HC) of fifty-seven participants randomly allocated to receive either written instruction or video instruction were compared with those of a trained technician.