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Table 1 Results of meta-regression models for the influence of study and subgroup characteristics on prevalence estimates (risk scale)

From: Socioeconomic factors and other sources of variation in the prevalence of genital chlamydia infections: A systematic review and meta-analysis

Study/subgroup characteristics Number of observ-ations (studies)a Unadjusted model Mutually adjusted
Risk difference (95 % confidence interval) p value Risk difference (95 % confidence interval) p value
Gender Men 24 (17) 1 1
  Women 28 (20) 0.010 (0.000, 0.020) p = 0.043 0.011 (0.001, 0.021) p = 0.031
Age Under 20 24 (12) 1 1
  Over 20 28 (15) 0.013 (0.004, 0.023) p = 0.008 0.011 (0.000, 0.022) p = 0.048
Region Europe 44 (17) 1 1
  Outside Europe 8 (4) 0.004 (−0.010, 0.018) p = 0.577 0.012 (−0.005, 0.030) p = 0.160
Response rate (per 10 % increase) 52 (21) 0.000 (−0.003, 0.003) p = 0.981 0.000 (−0.004, 0.004) p = 0.998
Study topic General health 9 (4) 1 1
  Sexual health 43 (17) 0.009 (−0.004, 0.021) p = 0.165 0.010 (−0.006, 0.027) p = 0.208
Date Before 2006 37 (17) 1 1
  After 2006 15 (5) −0.001 (−0.013, 0.011) p = 0.830 0.003 (−0.008, 0.015) p = 0.558
Number tested (per 1000 increase in sample) 52 (21) 0.001 (−0.003, 0.004) p = 0.775 0.000 (−0.004, 0.004) p = 0.985
  1. aThe number of studies adds to more than 21 for gender, age and date of study because some studies reported multiple prevalence estimates for these variables