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

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

Study/subgroup characteristics		Number of observ-ations (studies)^a	Unadjusted model	Mutually adjusted
Study/subgroup characteristics		Number of observ-ations (studies)^a	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

^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

ISSN: 1471-2458