Appendix 1.

Characteristics Associated with HIV Testing (Excluding Those at Higher Risk of HIV Risk in the Last 12 Months)—NHIS 2007

	Adjusted prevalence ratio (95% CI)	p Valuef
Mental illness diagnoses/symptoms (Ref: no mental illness)
Persons with schizophreniaa	1.68 (1.30–2.18)	<0.01
Persons with bipolar disorderb	1.62 (1.42–1.85)	<0.01
Persons with depression/anxietyc	1.32 (1.25–1.39)	<0.01
Age, years (Ref: 18–24)
25–44	1.40 (1.29–1.51)	<0.01
45–64	0.85 (0.78–0.92)	<0.01
65 and above	0.32 (0.28–0.37)	<0.01
Sex (Ref: male)
Female	1.15 (1.09–1.20)	<0.01
Race/ethnicity (Ref: white, non-Hispanic)
Black, non-Hispanic	1.61 (1.53–1.70)	<0.01
Hispanic	1.18 (1.10–1.26)	<0.01
Other race	0.99 (0.90–1.08)	0.76
Marital status (Ref: married/living with partner)
Never married	0.81 (0.75–0.87)	<0.01
Widowed/divorced/separated never married	1.08 (1.02–1.14)	<0.01
Total combined family income (Ref: <$20,000)
$20,000–$54,999	0.95 (0.89–1.01)	0.10
$55,000–$74,999	0.91 (0.84–0.99)	0.03
$75,000 and over	0.94 (0.88–1.01)	0.10
Education (Ref: less than high school)
High school graduate	0.94 (0.87–1.01)	0.11
Some college and bachelor's degree	1.18 (1.10–1.27)	<0.01
Masters, doctorate, or professional school degree	1.30 (1.18–1.42)	<0.01
Active substance abuse (Ref: no)d
Yes	1.18 (0.90–1.56)	0.26
Excessive alcohol or tobacco use (Ref: no)e
Yes	1.18 (1.09–1.28)	<0.01

CI, confidence interval; Ref, reference group.

^aCategory includes persons with schizophrenia, as well as other psychiatric disorders.

^bCategory includes persons with bipolar disease, as well as other psychiatric disorders, except schizophrenia.

^cCategory includes only persons with symptoms of depression and/or anxiety;

^dBased on responses to the following question: “During the past 12 months, have you had substance abuse, other than alcohol or tobacco?”

^eBased on responses to the following question: “During the past 12 months, have you had excessive use of alcohol or tobacco?”

^fCompared to the reference level for each variable.