EXHIBIT 1.

Characteristics of the sample, study of the accuracy of health insurers’ mental health provider directories

		Used insurer’s mental health provider directory
Characteristics	Full sample	Yes (n = 348)	No (n = 489)
Used mental health directory In the past 12 months	44%	100%	0%
Age, years
18–34	41	43	39
35–49	35	37	33
50–64	25	20	28
Sex
Female	58	56	59
Male	42	44	41
Race/ethnicity
Non-Hispanic white	66	62	70
Non-Hispanic nonwhite	17	18	17
Hispanic	16	20	13
Education
Less than a bachelor’s degree	55	52	57
Bachelor’s degree or higher	45	48	43
Self-reported health statusa
Excellent, very good, or good	87	86	88
Fair or poor	13	14	12
Marketplace planb
No	94	94	93
Yes	6	5	7
Psychological distress**
Less than serious or no psychological distress	64	59	68
Serious psychological distress	36	41	32

SOURCE Authors’ analysis of survey data from 2018. NOTES Except where otherwise noted, the sample included 837 privately insured English-speaking people in health plans with a provider network who had used outpatient specialty mental health care in the past twelve months. It excluded 24 people with missing data for any relevant outcome question. The sample sizes represent number of (unweighted) survey participants. The percentages were weighted to account for oversampling, survey recruitment, and nonresponse and to match respondents to the US population. Serious psychological distress was defined as a score of 13 or higher on the Kessler 6 scale. Significance was measured by chi-square tests of independence.

^a822 people.

^b808 people.

^**p < 0.05