| S. pneumoniae positive | S. pneumoniae negative | OR (CI) |
---|---|---|---|
 | n = 49 | n = 275 |  |
Receipt of antibioticsa | 7/37 (19%) | 82/240 (34%) | 0.4 (0.2-1.1) |
"Bay" resident (> 4 trainees per room) | 35 (71%) | 191 (69%) | 1.1 (0.6-2.2) |
Current smoker | 30 (61%) | 142 (52%) | 1.5 (0.8-2.8) |
Floor of barracks | Â | Â | Â |
   Floor 1 | 7/42 (17%) | 64/233 (28%) | 0.6 (0.2-1.6) |
   Floor 2 | 20/42 (47%) | 87/233 (37%) | 1.3 (0.6-2.6) |
   Floor 3 | 15/42 (36%) | 82/233 (35%) | 1 (Ref)b |
One or more symptomsc | 35 (71%) | 229 (83%) | 0.5 (0.3-1.0) |
 | C. pneumoniae positive | C. pneumoniae negative d | OR (CI) |
 | n = 37 | n = 48 |  |
Receipt of antibioticsa | 25 (69%) | 34 (71%) | 0.9 (0.3-2.3) |
"Bay" resident (> 4 trainees per room) | 30 (81%) | 31 (65%) | 2.4 (0.9-6.5) |
Current smoker | 18 (49%) | 16 (33%) | 1.9 (0.8-4.6) |
Floor of barracks | Â | Â | Â |
   Floor 1 | 2/34 (6%) | 9/45 (20%) | 0.2 (0-1.0) |
   Floor 2 | 11/34 (32%) | 15/45 (33%) | 0.6 (0.2-1.7) |
   Floor 3 | 21/34 (62%) | 18/45 (40%) | 1 (Ref)b |