Table 2.

Treatment Initiation Within 3 Months of Index Event by Baseline Characteristics

	Sample (n)	Anti-depressant medication only (%)	Therapy only (%)	Combined treatment (%)	Total any treatment (%)	No treatment (%)	p valuesa
Total	4612	19	29	16	64	36
Age at index event							.042
12–14	1346	8	42	14	64	36
15–17	1891	17	27	18	62	38
18–21	1375	33	18	15	66	34
Sexb							.53
Male	1550	19	27	17	63	37
Female	3060	20	29	15	64	36
Race							< .001
White/Caucasian	2904	22	29	18	69	31
Black/African American	298	15	25	9	49	51
Asian/Pacific Islander	155	17	26	14	57	43
Other/Multiracial	282	18	26	21	65	35
Missing	973	12	30	10	52	48
Ethnicity							< .001
Hispanic/Latino	887	13	29	9	51	49
Missing	342	14	31	11	56	44
Index Event							< .001
Positive PHQ (≥ 10)	1892	17	25	12	54	46
Depression diagnosis	1402	17	37	12	66	34
Bothc	1312	25	26	25	76	24
PHQ-9 Score at index event							< .001
Noned	1412	17	37	12	66	34
Moderate (10–14)	1563	15	27	12	54	46
Moderately Severe (15–19)	1088	24	23	20	67	33
Severe (20+)	549	27	22	29	78	22
Diagnosis at index event							< .001
Major Depression	1295	30	24	25	79	21
Dysthymia	208	25	32	7	64	36
Unspecified Depression	654	14	31	19	64	36
Adjustment Disordere	563	6	50	7	63	37
No diagnosisf	1892	17	24	12	53	47

Notes:

^aChi-square test of difference between “Total any treatment” and “No treatment” groups;

^bValues for sex were missing for two individuals.

^cBoth positive PHQ and depression diagnosis;

^dNew diagnosis only as index event;

^eOnly those with depressive symptoms included;

^fPositive PHQ only as index event