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Table 2 The association between Chlamydia infection and lung cancer

From: Combined and interaction effect of chlamydia pneumoniae infection and smoking on lung cancer: a case-control study in Southeast China

Variables Cases N (%) Controls N (%) OR(95%CI) OR(95%CI)a
Cpn
 Cpn IgG
  -(< 1:64) 121 (26.9) 185 (36.1) 1.00 1.00
   + (≥1:64) 328 (73.1) 327 (63.9) 1.53 (1.16–2.02) 1.42 (1.02–1.96)
 Cpn IgA
  -(< 1:32) 265 (59.0) 376 (73.4) 1.00 1.00
   + (≥1:32) 184 (41.0) 136 (26.6) 1.92 (1.46–2.52) 1.73 (1.25–2.38)
 Cpn IgG or IgA
  both- 105 (23.4) 161 (31.4) 1.00 1.00
  single+ 176 (39.2) 239 (46.7) 1.13 (0.83–1.55) 1.07 (0.74–1.54)
  both+ 168 (37.4) 112 (21.9) 2.30 (1.63–3.24) 2.00 (1.34–3.00)
Ctr
 Ctr IgG
  -(< 1:64) 376 (83.7) 447 (87.3) 1.00 1.00
   + (≥1:64) 73 (16.3) 65 (12.7) 1.34 (0.93–1.92) 1.04 (0.69–1.58)
  Ctr IgA
  -(< 1:32) 443 (98.7) 509 (99.4) 1.00 1.00
   + (≥1:32) 6 (1.3) 3 (0.6) 2.30 (0.57–9.24) 1.32 (0.30–5.86)
 Ctr IgG or IgA
  both- 373 (83.1) 446 (87.1) 1.00 1.00
  single+ 73 (16.3) 64 (12.5) 1.36 (0.95–1.96) 1.06 (0.69–1.61)
  both+ 3 (0.6) 2 (0.4) 1.79 (0.30–10.79) 1.12 (0.17–7.58)
Cps
  Cps IgG
  -(< 1:64) 406 (90.4) 481 (93.9) 1.00 1.00
   + (≥1:64) 43 (9.6) 31 (6.1) 1.64 (1.02–2.66) 1.28 (0.73–2.22)
 Cps IgA
  -(< 1:32) 444 (98.9) 508 (99.2) 1.00 1.00
   + (≥1:32) 5 (1.1) 4 (0.8) 1.43 (0.38–5.36) 1.82 (0.41–8.10)
 Cps IgG or IgA
  both- 404 (90.0) 478 (93.4) 1.00 1.00
  single+ 42 (9.4) 33 (6.4) 1.51 (0.94–2.42) 1.18 (0.68–2.05)
  both+ 3 (0.6) 1 (0.2) 3.55 (0.37–34.26) 4.02 (0.36–45.59)
  1. aAdjusted by age, sex, education, occupation, BMI, smoking, passive smoking, alcohol consumption, history of lung diseases, history of other diseases, family history of cancer, occupational physical activity, physical exercise, cooking oil fumes and pollution near the residence