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Table 1 Prevalence of CT infection with preterm delivery according to different factors

From: Association of Chlamydia trachomatis infections with preterm delivery; a systematic review and meta-analysis

  Study NO. Prevalencea (95% CI) Weight %
Diagnostic method PCR 10 0.06 (0.04–0.09) 45.50
Serology 8 0.23 (0.10–0.35) 27.90
Culture 6 0.17 (0.10–0.24) 26.60
Total 24 0.13 (0.11–0.24) 100
Study type Case – control 9 0.16 (0.11–0.21) 36.67
Sectional 15 0.13 (0.08–0.17) 66.33
Total 24 0.13 (0.11–0.24) 100
Continent Europe 14 0.13 (0.09–0.18) 59.55
Asia 3 0.08 (−0.01–0.17) 10.70
USA 6 0.15 (0.08–0.22) 20.06
Africa 1 0.29 (0.23–0.34) 3.69
Total 24 0.13 (0.11–0.24) 100
Recognize group NO 14 0.04 (0.02–0.05) 57.08
Yes 10 0.26 (0.19–0.33) 42.92
Total 24 0.13 (0.11–0.24) 100
  1. aPoint estimate and confidence interval were estimated using random effects model