Table 1.

Sample Characteristics of the Uninsured Adults with Mental Health Conditions Who Were Enrolled in the Low-Income Health Program in San Diego County from 2012 to 2013, Based on Enrollment and Claims Data

Characteristic	Overall	Had 15-Day Follow-Up Visit	Did Not Have 15-Day Follow-Up Visit	Had 30-Day Readmission	Did Not Have 30-Day Readmission
Sample size (n)	1,905	796	1,109	251	1,654
Had 15-day outpatient follow-up visit (%)	42	—		37	43
Had 30-day readmission (%)	13	12	14	—	—
Utilization within six months prior to index admission
Average number of evaluation and management visits	0.66	0.79	0.56	0.70	0.65
Average number of emergency department visits	0.37	0.38	0.36	0.50	0.34
Index admission was medical (vs. surgical) (%)	67	67	66	69	66
Index admission was surgical (vs. medical) (%)	33	33	34	31	34
Average number of months enrolled prior to index admission	13.25	13.61	12.99	11.92	13.45
Severity indicators
Length of stay of index admission in days	4.65	4.69	4.62	5.58	4.51
CDPS risk score	1.93	2.03	1.85	2.14	1.89
Substance abuse (%)	56	50	60	70	54
Depression (%)	55	56	54	57	54
Schizophrenia (%)	12	10	13	14	11
Bipolar Disorder (%)	44	46	42	48	43
Demographics (%)
Female	49	53	47	42	51
Male	51	47	53	58	49
Age (%)
18 to 34	16	12	20	19	16
35 to 44	18	18	19	20	18
45 to 54	41	41	41	40	41
55 to 65	24	30	21	21	25
Race/Ethnicity (%)
White	45	46	45	49	45
African American	9	7	11	7	10
Latino	17	19	16	16	17
Asian American/Pacific Islander	4	5	4	2	5
Other	1	1	1	2	0
Missing	24	23	24	25	24

CDPS (Chronic Illness and Disability Payment System) measures severity based on utilization of services with a combination of acute and chronic diagnoses.