| Gastric aspirate | Respiratory | ||
---|---|---|---|---|
 | Placebo group | Probiotic group | Placebo group | Probiotic group |
Number of patients acquiring P. aeruginosa during the stay | 6 | 3 | 13 | 5 |
Median time before acquisition (days [range]) | 30 (6–53) | 16 (6–18) | 11a (5–40) | 50a (11–75) |
NAE mean (95% CI) | 73 (60–85) | 87 (82–92) | 69a (59–79) | 77a (67–87) |
% NA at day 21 | 97.4 | 94.7 | 85.3 | 98.5 |
% NA at day 42 | 84.4 | 94.7 | 70.9 | 93.3 |