Agreement between measured and self-reported height, weight and BMI in predominantly European middle-aged New Zealanders: findings from a nationwide 1989 survey.

Aim: To examine the agreement between self-reported and measured height, weight and BMI in 40-50 year old New Zealand men and women.

Method: Self-reported and measured height, weight and derived BMI were examined using data from 345 40-50 year old participants in the 1989/1990 Life In New Zealand Survey. Factors associated with biased reporting were assessed using regression models.