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Table 2 Stratified and pooled analysis of studies included in meta-analysis of delayed antenatal care and pregnancy intention based on study design and type of country, 1980-2012

From: The effects of pregnancy intention on the use of antenatal care services: systematic review and meta-analysis

Stratifying variable Sample size Random effects Fixed effects Heterogeneity P
Study Design      
Cross-sectional 121,035 1.43(1.26-1.61) 1.37(1.33-1.41) 281.2 0.001
Prospective cohort 6944 1.36(1.17-1.59) 1.36(1.17-1.59) 5.93 0.762
Type of country      
Developed 65,743 1.50(1.34-1.68) 1.64(1.57-1.71) 49.7 0.001
Developing 62,446 1.36(1.13-1.65) 1.26(1.20-1.33) 97.8 0.001
Pooled estimate 128,199 1.42(1.27-1.59) 1.37(1.33-1.41) 286.2 0.001