Table 2. Effect of chlorhexidine - nystatin oral rinse on culture contamination.

Primary Outcome
Contamination Rate % (N)	Oral Rinse n = 110	No Oral Rinse n = 110	Risk Difference (95% CI)	p-value
All Patients	4 (4)	15 (16)	−11 (−18, −3)	0.005
HIV-positivep	3 (3)q	18 (15)r	−14 (−23, −6)	0.002
HIV-negatives	6 (1)t	4 (1)u	2 (−12, +15)	0.81

^pN = 177, Total HIV positive participants;

^qn = 92,

^rn = 85.

^sN = 43, Total HIV negative participants;

^tn = 18,

^un = 25.