TABLE 2

Risk for Contamination and a Positive Urinalysis

OutcomeCleaning Group (N = 179)Noncleaning Group (N = 171)Total
Contaminateda144155
Noncontaminated165130295
Positive urinalysisb3763100
Negative urinalysis142108250
  • a RR: 0.37 (95% CI: 0.19–0.57).

  • b RR: 0.56 (95% CI: 0.40–0.79).