Table 1. Distribution of Patient Characteristics Among Cases With Field Evidence of Recent Transmission (RT) (n = 72), Patients With Evidence of Possible RT (n = 103), and Patients With No Field Evidence of RT (n = 1,013), Arkansas, Maryland, and Massachusetts, January 1, 1998–September 30, 2000.

Characteristic	Evidence of RT (n = 72)		Possible RT (n = 103)		No Evidence of RT (n = 1,013)		P Value
	No.	Row %	No.	Row %	No.	Row %
Sex							0.0420
Female	22	4.5	35	7.2	431	88.3
Male	50	7.1	68	9.7	582	83.1
Age, years							<0.0001
≤4	4	66.7	0	0.0	2	33.3
5–14	0	0.0	1	9.1	10	90.9
15–24	16	11.8	17	12.5	103	75.7
25–44	30	7.4	47	11.6	327	80.9
45–64	18	6.0	29	9.7	252	84.3
≥65	4	1.2	9	2.7	319	96.1
Nativity							<0.0001
US-born	60	9.9	60	9.9	488	80.3
Foreign-born	11	1.9	43	7.5	523	90.6
Unknown	1	33.3	0	0.0	2	66.7
Race/ethnicitya							0.0006
White	17	4.6	29	7.8	327	87.7
Black	42	9.7	48	11.1	341	79.1
Hispanic	7	5.1	13	9.5	117	85.4
American Indian/Alaska Native	0	0.0	0	0.0	1	100.0
Asian or Pacific Islander	5	5.8	13	5.4	224	92.6
Unknown	1	25.0	0	0.0	3	75.0
Homeless							0.0950
Yes	5	12.2	7	17.1	29	70.7
No	67	5.9	96	8.4	976	85.7
Unknown	0	0.0	0	0.0	5	100.0
Excess alcohol use							<0.0001
Yes	13	10.5	25	20.2	86	69.4
No	54	5.5	70	7.2	853	87.3
Unknown	5	5.8	8	9.3	73	84.9
Injecting drug use							0.0013
Yes	6	22.2	5	18.5	16	59.3
No	63	5.8	93	8.6	932	85.7
Unknown	3	4.1	5	6.9	65	89.0

Abbreviation: RT, recent transmission.

^aPersons of Hispanic ethnicity might be of any race; non-Hispanic persons were categorized as Asian or Pacific Islander, black, white, American Indian/Alaska Native, or unknown.