TABLE 3.

Risk factors for people colonized with MRSA compared to those colonized with MSSA and those not colonized with S. aureus by univariate analysis using polytomous logistic regression^a

Parameter	Odds ratio		Overall P value
	MRSA vs No_C	MRSA vs MSSA
Age	0.9871	0.9890	0.2510
Sex	0.9869	0.7589	0.0189
Education degreeb
Elementary school	0.8628	0.4210	0.5298
Junior high school	0.3761	0.3636	0.4672
Senior high school	0.3511	0.2432	0.2118
University	0.3277	0.1821	0.0996
Graduate or beyond	0.4195	0.1984	0.1602
Marital statusc
Married	0.6749	0.6259	0.1452
Divorced	0.3218	0.3751	0.4951
Working as a HCW	1.3303	1.7320	0.1919
Living in a dormitory	0.5325	0.4776	0.7774
No. of household members	1.1071	1.1435	0.0749
Presence of household members who are HCWs	1.4610	0.8889	0.0092
Presence of household members ≤7 yr old	2.3429	2.9344	<0.0001
Presence of household members who are bedridden	1.2716	1.0640	0.7475
Chronically ill	1.2532	1.1827	0.4711
Smoking habits	0.4599	0.7901	<0.0001
Hospitalization within the past year	1.4553	1.7637	0.3609
Cared for inpatients within the past year	1.1221	1.2355	0.6465
Visited outpatient clinics within the past year	1.0414	1.1467	0.5941
Used antibiotics within the past year	2.0749	2.0968	0.0021
Tattoo and/or acupuncture and/or using parenteral drugs and/or dialysis	0.6332	0.5987	0.7948
Skin or soft-tissue injury within the past year	0.9004	0.8875	0.8420
Shower everyday	0.7620	1.0909	0.3533
Visited public amusement places within the past year	0.8414	0.9904	0.1765
Family income (NTD)
20,000-50,000	0.4722	0.1071	0.2864
50,000-100,000	1.3935	0.3125	0.3454
100,000-200,000	1.1057	0.2105	0.2842
200,000-300,000	1.6451	0.6000	0.6324
Over 300,000	0.7437	0.1944	0.4139

^aNo_C, no S. aureus colonization; HCWs, health care workers; NTD, new Taiwan dollar.

^bUsing the under-elementary-school category result as the baseline.

^cUsing the unmarried category result as the baseline.

^dUsing the less-than-20,000 category result as the baseline.