Table 3 Observed and estimated ventilator-associated pneumonia (VAP) in ICUs of University of Lyon hospitals (France), January 2001-December 2009
Period of VAP estimation | Period of VAP surveillance | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Characteristics | Day 0 | Day 1 | Day 2 | Day 3 | Day 4 | Day 5 | Day 6 | Day 7 | Day 8 |
Observed cumulative invasive mechanical ventilation days at risk | 1,693.5 | 5,059.5 | 8,382.5 | 10,944.5 | 12,960.5 | 14,549.5 | 15,858.5 | 16,926.5 | 17,792.5 |
Observed number of VAP | - | - | 50 | 82 | 77 | 54 | 50 | 31 | 23 |
Estimated number of VAP (95% CI) | 9 (5-19) | 33 (22-50) | 57 (46-72) | 71 (62-81) | 73 (63-83) | 64 (55-74) | 49 (42-57) | 33 (27-40) | 20 (14-28) |
Observed cumulative incidence of VAP (95% CI) | - | - | 6.0 (4.5-7.8) | 12.1 (10.1-14.3) | 16.1 (14.1-18.4) | 18.1 (16.0-20.4) | 19.7 (17.6-22.0) | 20.3 (18.3-22.6) | 20.6 (18.6-22.8) |
Estimated cumulative incidence of VAP (95% CI) | 5.3 (2.6-9.8) | 8.3 (6.1-11.1) | 11.8 (9.7-14.3) | 15.5 (13.3-18.0) | 18.8 (16.5-21.2) | 21.1 (18.8-23.6) | 22.5 (20.2-24.9) | 23.0 (20.1-25.4) | 23.0 (20.8-25.3) |