Birth cohort effect on the obesity epidemic in Denmark
Birth cohort effect on the obesity epidemic in Denmark
复制标题
DOI：
10.1097/01.ede.0000208349.16893.e0
复制
发表时间：
2006-05-01
期刊：
影响因子：
5.4
通讯作者：
Sorensen, TIA
中科院分区：
文献类型：
--
作者：
Olsen, LW;Baker, JL;Sorensen, TIA
背景：在丹麦，肥胖症的流行是分阶段发展的。为了调查这是否是一个出生队列现象，我们探讨了男孩和年轻男性肥胖患病率的长期趋势。方法：我们计算了163，835名7-11岁丹麦男孩和708，342名19岁男性应征者的身体质量指数（BMI; kg/m2）。根据年龄特异性标准定义男孩肥胖，男性肥胖定义为BMI >= 31 kg/m2。我们研究了从1930年到1999年的肥胖患病率的趋势，表示时间为主题的测量年和出生year of birth.Results：当表示的测量年，4个阶段的肥胖患病率出现的男孩和年轻人，但他们发生在不同的时间。然而，当以出生年份表示时，肥胖的2个稳定期和2个急剧增加的时期发生在相同的出生年份。从20世纪40年代初到20世纪50年代中期，从20世纪60年代末开始，出生队列的肥胖症患病率增加。结论：肥胖症患病率的趋势在男孩和年轻男性中相似，只有当表示出生年份时，这表明早期生活可能是发展肥胖症的易感时期。具体而言，从20世纪40年代初到50年代中期以及从60年代后期开始，出生队列中观察到的肥胖患病率增加表明，这些队列早期生活的变化导致了后期肥胖的增加。
Background: In Denmark, the obesity epidemic has developed in phases. To investigate if this has been a birth cohort phenomenon, we explored the secular trend in the prevalence of obesity among boys and young men.Methods: We calculated body mass index (BMI; kg/m(2)) over time for 163,835 Danish boys examined at ages 7-11 years and for 708,342 male draftees examined at age 19 years. Obesity was defined according to age-specific criteria for boys and as BMI >= 31 kg/m(2) for men. We examined trends in the prevalence of obesity from 1930 through 1999, expressing time as the subjects' year of measurement and as year of birth.Results: When expressed by year of measurement, 4 phases in the prevalence of obesity emerged for the boys and the young men, but they occurred at different times. However, when expressed by year of birth, the 2 stable periods and the 2 periods with sharp increases in obesity occurred in the same birth years. An increased prevalence of obesity was identified for birth cohorts from the early 1940s to the mid-1950s and from the late 1960s onward.Conclusions: The trends in the prevalence of obesity were similar in boys and young men only when expressed by year of birth, which suggests that early life may be a susceptible period for developing obesity. Specifically, the increased prevalence of obesity observed for birth cohorts from the early 1940s to the mid-1950s and from the late 1960s onward suggests that changes in the early life of these cohorts resulted in an increase in obesity at later ages.