Table 4.

Age at onset and number of lifetime episodes of major depressive disorder, by maltreatment group

	Percentile
	25th	50th	75th
Age at onset, years
No reported maltreatment	15	18	20
Retrospectively ascertained maltreatment	13	16	18
Prospectively ascertained maltreatment	12	14	17
Lifetime episodes, n
No reported maltreatment	1	2	4
Retrospectively ascertained maltreatment	1	2	5
Prospectively ascertained maltreatment	1.5	3.5	10