TABLE 2.

Univariate analysis of risk factors for B. henselae bacteremia or seropositivity^a

Risk factor	No. of tested samples	Bacteremia		No. of tested samples	Seropositivity
		OR	95% CL		OR	95% CL
Age (mo)
0-6	150	1.00		156	1.00
7-12	73	0.814	0.43, 1.54	73	1.68	0.96, 2.96
13-18	28	0.299	0.09, 1.04	28	0.62	0.27, 1.42
19+	13	0.207	0.03, 1.64	14	2.77	0.83, 9.21
Neutering status
Intact male	36	1.00		39	1.00
Neutered male	97	2.27	0.79, 6.46	99	1.59	0.75, 3.37
Intact female	64	1.73	0.57, 5.29	64	1.44	0.64, 3.21
Neutered female	64	2.82	0.95, 8.32	66	1.95	0.87, 4.36
Source
Friend, self, or breeder	96	1.00		98	1.00
Stray or shelter	105	2.22	1.14, 4.32	110	2.06	1.18, 3.59
Store or newspaper	37	1.28	0.50, 3.29	37	0.42	0.18, 0.96
Flea infestation
Never	98	1.00		99	1.00
Ever	162	3.84	1.89, 7.80	168	3.84	1.89, 7.8
Region
Washington, D.C.	29	1.00		32	1.00
Chicago area	47	0.43	0.09, 2.06	48	0.36	0.11, 1.15
Florida	93	3.12	1, 9.77	94	5.19	2.14, 12.55
Southern California	95	2.48	0.79, 7.80	97	4.14	1.73, 9.91
Season
Winter	105	1.00		106	1.00
Spring	43	0.69	0.30, 1.57	44	1.84	0.88, 3.86
Summer	31	0.44	0.15, 1.24	31	0.41	0.18, 0.95
Autumn	85	0.62	0.31, 1.19	90	0.72	0.41, 1.26
Antibiotics use in past 2 wks
No	220	1.00		225	1.00
Yes	25	1.82	0.76, 4.35	27	0.66	0.29, 1.48
Hunting
No	198	1.00		205	1.00
Yes	21	2.84	1.14, 7.10	21	3.89	1.27, 11.97
Breed
Purebred	13	1.00		13	1.00
Mixed breed	249	1.84	0.4, 8.56	256	2.61	0.78, 8.71
Multiple-cat home
No	76	1.00		77	1.00
Yes	150	0.983	0.53, 1.84	156	0.71	0.41, 1.23
Ever sick
No	175	1.00		181	1.00
Yes	81	1.36	0.75, 2.48	82	0.95	0.56, 1.59
Litter box use
Never	11	1.00		11	1.00
Occasionally	12	0.875	0.16, 4.87	12	0.07	0.01, 0.75
Regularly	196	0.583	0.16, 2.08	203	0.12	0.01, 0.92
Ever bitten
No	204	1.00		210	1.00
Yes	28	1.03	0.41, 2.56	29	1.1	0.5, 2.4
Environment
Indoor	177	1.00		182	1.00
Outdoor only or indoor and outdoor	50	1.02	0.52, 1.98	52	1.19	0.67, 2.13

^aCats with contaminated cultures were not included in the analysis. OR, odds ratio; 95% CL, 95% confidence limits.