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Table 2 Factors associated with pneumococcal carriage or C. pneumoniae detection among Alpha and Hotel Company trainees

From: Outbreak of Pneumonia in the Setting of Fatal Pneumococcal Meningitis among US Army Trainees: Potential Role of Chlamydia pneumoniae Infection

  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    
   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    
   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
  1. aTrainee reported taking antibiotics during February 1-19, 2009
  2. bTrainees living on the 3rd floor of the barracks were used as the reference group for comparison with trainees living on the first and second floors of the barracks
  3. cOf the following symptoms: fever, chills, cough with or without sputum, difficulty breathing, wheezing, runny nose, sore throat or ear pain
  4. d Two Alpha Company trainees with respiratory specimens that were negative for C. pneumoniae were not included in univariate analysis including one trainee who had a sample that could not be linked back to the survey data and one trainee who gave a respiratory specimen but did not complete a survey