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So these here are three different exams
所以同一样本群被分为了不同年龄组
at different ages in the same cohort
他们接受了三次不同的测试
And this over the Y axis is the overall effect
Y轴显示的是
relating each unit change in BMI score per hour of sleep
每小时睡眠改变的BMI的总体变化情况
for boys and for girls
有男孩 也有女孩
And what it shows that in boys here at the age 8 to 11
数据显示 对于8到11岁的男孩来说
each 1 hour of decrease in sleep duration
睡眠时间每减少1小时
was associated actually with adjusted 0.31 decrease in BMI z-score
他们的BMI标准分数调整后就会降低0.31
And that actually still was significant
如果我们从横向来看这些数据
when you looked at these relationships cross-sectionally
两者间的联系仍然非常的显着
when the boys were 13 to 16
13到16岁的男孩
although the association was a little bit less
尽管两者的联系稍弱一些
and then it was not significant when they were teens
青少年时期的联系不是很显着
And you see a much much weaker association in girls
大家看到女孩的这种联系相对较弱
However, these were still cross-sectional
然而 这还是横向数据
and then what we did though was ask the question, was:
接下来我们提出了一个问题
did the sleep duration at ages 8 to 11
8到11岁年龄组的睡眠时间
then predicts subsequent BMI first at ages 13 to 16
是否会影响13到16岁年龄组
and then 16 to 19
以及随后16到19岁年龄组的BMI得分?
And this is gonna be a little complicated
这是一个复杂的问题
but let me point this out
但我先把它提出来
