Longitudinal changes in desired body weight compared to changes in body weight: evidence of adaptation to weight gain?

摘要

BackgroundOverweight individuals desire a lower weight than they actually have. Little is known on the extent to which this discrepancy is reduced over time due to adaptation or resignation. The aim of this study is to describe cross-sectional relationships and longitudinal changes in desired body weight and differences between actual and desired body weight according to gender, age and category of body mass index in a large, adult cohort in Troms?, Norway. MethodsCross-sectional analyses of 8960 men and 9992 women aged 25–69 participating in Troms? 4 (during 1994–1995), and longitudinal analyses of 3210 men and 3689 women participating in both Troms? 4 (during 1994–1995) and Troms? 6 (during 2007–2008). Simple descriptive statistics and linear regression was used to describe actual and desired weight, the difference between them, and how gender and age are related to the changes in actual and desired weight over this 13-year period. ResultsThe difference between actual and desired body weight was largest for the obese and higher among the overweight than the normal weight for both genders. While normal weight men were quite satisfied with their body weight, normal weight women were not. Actual weight increased more than desired weight for all age groups and both genders except the oldest women. The difference between change in actual body weight and change in desired body weight during the 13-year follow-up was significantly larger among men (2.0?kg) than women (1.5?kg) ( p ConclusionOlder people adapt more to weight gain than younger age groups, with clear gender differences. Further studies of longitudinal changes in desired weight are warranted.