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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