Sares-Jäske L, Knekt P, Männistö S, Lindfors O, Heliövaara M
Department of Public Health Solutions National Institute for Health and Welfare Helsinki Finland.
Department of Public Health University of Helsinki Helsinki Finland.
Obes Sci Pract. 2019 Mar 26;5(4):291-303. doi: 10.1002/osp4.336. eCollection 2019 Aug.
This prospective study explores whether dieting attempts and previous changes in weight predict changes in body mass index (BMI) and waist circumference (WC).
The study was based on the representative Finnish Health 2000 Survey and on its follow-up examination 11 years later. The sample included 2,785 participants, aged 30-69. BMI and WC were determined at health examinations. Information on dieting attempts and previous changes in weight was collected using a questionnaire including questions on whether participant had tried to lose weight (no/yes), gained weight (no/yes) or lost weight (no/yes) during the previous year.
At baseline, 32.8% were dieters. Of these, 28.4% had lost weight during the previous year. Dieters had higher BMI and WC than non-dieters. During the follow-up, the measures increased more in dieters and in persons with previous weight loss. The mean BMI changes in non-dieters versus dieters were 0.74 (standard deviation [SD] 2.13) kg/m and 1.06 (SD 2.77) kg/m ( = 0.002), respectively. The corresponding numbers for those with no previous weight change versus those who had lost weight were 0.65 (SD 2.07) kg/m and 1.52 (SD 2.61) kg/m. The increases in BMI and WC were most notable in dieters with initially normal weight.
The increases in BMI and WC were greater in dieters than in non-dieters, suggesting dieting attempts to be non-functional in the long term in the general population.
这项前瞻性研究探讨节食尝试及既往体重变化是否能预测体重指数（BMI）和腰围（WC）的变化。
该研究基于具有代表性的芬兰2000年健康调查及其11年后的随访检查。样本包括2785名年龄在30 - 69岁的参与者。在健康检查时测定BMI和WC。使用问卷收集有关节食尝试及既往体重变化的信息，问卷包括关于参与者在前一年是否试图减肥（否/是）、体重增加（否/是）或体重减轻（否/是）的问题。
在基线时，32.8%的人是节食者。其中，28.4%的人在前一年体重减轻。节食者的BMI和WC高于非节食者。在随访期间，节食者和既往体重减轻者的这些指标增加得更多。非节食者与节食者的平均BMI变化分别为0.74（标准差[SD]2.13）kg/m²和1.06（SD 2.77）kg/m²（P = 0.002）。既往体重无变化者与体重减轻者的相应数字分别为0.65（SD 2.07）kg/m²和1.52（SD 2.61）kg/m²。BMI和WC的增加在初始体重正常的节食者中最为显著。
节食者的BMI和WC增加幅度大于非节食者，这表明在一般人群中，从长期来看节食尝试并无作用。
