actually more likely to die at an earlier age,

那么很可能他会在比较年轻的时候就去世
and that's why we see relatively low rates in older age people.

所以我们在老年人群中看到相对较低的发病率
We don't know yet which of these explanations is true.

我们不知道哪个解释是正确的
It may be that they're all true to some extent.

可能他们都对
There are also gender differences in depression.

抑郁也有性别差异
These are data from a compilation of hundreds of studies

这是收集数百个研究儿童和青年年研究的数据结果
of children and adolescents, looking at not full-blown depression

不是关注完全的抑郁
but levels of depression on self report questionnaires.

而是各种程度的抑郁症
Probably most of you have filled out these questionnaires,

你们很多人可能都填过这种调查问卷
like the Beck Depression Inventory

就像贝克抑郁量表
that ask you how you've been feeling in the last month.

问你上个月感觉怎么样
And there's a kiddy version of this,

也有儿童版的