Table 1. Characteristics of cases (colonized infants) and controls (noncolonized infants).

	Cases (n = 177)	Controls (n = 1763)	Level of significance (p-value)*
Birth weight (median and range)	1.59 kg (0.46–4.38 kg)	2.42 kg (0.35–5.28 kg)	<0.001
Gestational age (median and range)	31 weeks (23–42 weeks)	35 (22–42 weeks)	<0.001
Length of stay (median and range)	49 days (1–295 days)	13 days (1–248 days)	<0.001
Birth by caesarean section	73.4% (130/177)	61.8% (1090/1763)	0.003
White race	57.6% (102/177)	69.7% (1229/1763)	0.004
Born off-site	22.6% (40/177)	33.0% (581/1763)	0.006
Multiple births	24.3% (43/177)	20.1% (355/1763)	0.23
Male gender	54.2% (96/177)	57.1% (1006/1763)	0.52
MRSA infection	18.6% (33/177)	n/a
Days to positive MRSA (median and range)	12 (0–167)	n/a

*As determined by Kruskal-Wallis and Chi2 tests