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Table 2 Multivariate analysis of sociodemographic and service-related characteristics associated with incident Chlamydia trachomatis infection among female and male soldiers, Fort Bragg, 2005-2010

From: Chlamydia trachomatis infection rates among a cohort of mobile soldiers stationed at Fort Bragg, North Carolina, 2005–2010

   Female   Male
  Hazard ratio 95% CI Hazard ratio 95% CI
Age (years)     
  17-20 2.64 (2.03-3.43) 2.24* (1.85-2.71)
  21-25 1.94 (1.53-2.46)
  26-67 1.00   1.00  
  Missing     
Race/ethnicity     
  Non-white 1.48 (1.29-1.70) - -
  Black - - 3.79 (3.33-4.31)
  Hispanic - - 1.62^ (1.38-1.89)
  Other - -
  White 1.00   1.00  
  Unknown     
Grade     
  E1-E4 2.21 (1.65-2.97) 1.99 (1.60-2.48)
  E5+ 1.00   1.00  
Education     
  High school or less 1.54 (1.18-2.00) 2.22 (1.75-2.83)
  Some college or higher 1.00   1.00  
  Unknown     
Marital status     
  Single 1.34 (1.14-1.58) 1.19 (1.03-1.38)
  Non-single 1.00   1.00  
  Unknown     
History of prior PCS     
  0-3 1.09 (0.87-1.36) 1.04 (0.87-1.24)
  4-34 1.00   1.00  
Breaks in duty at Ft. Bragg     
  Yes 0.31 (0.21-0.45) 0.28 (0.20-0.41)
  No 1.00   1.00  
History of prior deployments     
  1-3 0.58 (0.40-0.85) 1.08 (0.88-1.33)
  None 1.00   1.00  
Deployment during study     
  Yes 0.24 (0.20-0.28) 0.28 (0.25-0.32)
  No 1.00   1.00  
History of Ct NS   
  Yes - - 1.34 (0.97-1.86)
  No - - 1.00  
History of GC before entry and initial Ct NS   
  Yes - - 3.60 (2.63-4.93)
  No - - 1.00  
Months in service at entry     
  0 to 14 1.13 (0.93-1.37) 0.96 (0.81-1.13)
  15 to 297 1.00   1.00  
Primary occupation specialty at entry     
  Combat 0.73 (0.60-0.90) 0.93 (0.82-1.06)
  Other 1.00   1.00  
  1. Note: CI - confidence interval; NS - not significant; PCS - permanent change in station.
  2. *Age groups 17–20 and 21–25 were collapsed into a single group.
  3. ^Race/ethnic groups Hispanic and Other were collapsed into a single group.