Predictors of Staphylococcus aureus Colonization and Results after Decolonization

Table 1

(a) Demographics and clinical characteristics of all total knee and total hip patients between October 2011 and March 2013 ( = 4,042), with follow-up of at least one year, grouped by screening status. (b) Demographics and clinical characteristics of all total knee and total hip arthroplasty patients screened between October 2011 and March 2014 ( = 3,927), grouped by carrier status.

(a)

	Screened	Not screened
(%)	2,291 (56.7%)	1,751 (43.4%)
Mean age (SD)	63.8 (11.2)	64.2 (12.0)	0.24
Gender, (%)			0.90
Female	1,352 (59%)	1051 (60%)
Male	939 (41%)	700 (40%)
Joint, (%)			0.80
Hips	939 (41%)	700 (40%)
Knees	1,352 (59%)	1,051 (60%)
Mean Charlson Comorbidity Index (SD)	3.4 (1.7)	3.7 (1.9)	<0.01
Mean body mass index (SD)	32.1 (7.2)	31.9 (8.4)	0.43
Previous inpatient stay
0-1 month, (%)	115 (5%)	105 (6%)	0.17
1-2 months, (%)	252 (11%)	201 (12%)	0.16
2-3 months, (%)	367 (16%)	298 (17%)	0.48
3–6 months, (%)	664 (29%)	508 (29%)	0.67
6–12 months, (%)	1,054 (46%)	753 (43%)	0.03

(b)

	MSSA	MRSA	Noncarrier
(%)	798 (20.3%)	177 (4.5%)	2,952 (75.2%)
Mean age (SD)	62.3 (11.4)	63.8 (11.5)	64.2 (10.9)	<0.01
Gender, (%)				<0.01
Female	423 (53%)	99 (56%)	1,801 (61%)
Male	375 (47%)	78 (44%)	1,151 (39%)
Joint, (%)				0.14
Hips	351 (44%)	76 (43%)	1,181 (40%)
Knees	447 (56%)	101 (57%)	1,771 (60%)
Mean Charlson Comorbidity Index (SD)	3.3 (1.7)	3.6 (1.8)	3.5 (1.6)	<0.01
Mean body mass index (SD)	32.4 (7.3)	32.9 (8.0)	31.8 (7.1)	0.02
Previous inpatient stay
0-1 month, (%)	32 (4%)	7 (4%)	148 (5%)	0.72
1-2 months, (%)	72 (9%)	23 (13%)	295 (10%)	0.27
2-3 months, (%)	112 (14%)	41 (23%)	413 (14%)	0.01
3–6 months, (%)	200 (25%)	67 (38%)	768 (26%)	<0.01
6–12 months, (%)	319 (40%)	97 (55%)	1,210 (41%)	<0.01

MSSA: methicillin-sensitive Staphylococcus aureus; MRSA: methicillin-resistant Staphylococcus aureus.