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Table 2 Distribution of continuous potential confounders by exposure status in the unweighted and weighted study samples

From: An application of propensity score weighting to quantify the causal effect of rectal sexually transmitted infections on incident HIV among men who have sex with men

  Unweighted Weighted
Variable (Exposure group) Mean (95% CI) Median (IQR) Range Standardized bias Mean (95% CI) Median (IQR) Range Standardized bias
Age (No STI) 29.6 (29.0, 30.2) 28.1 (24.4, 33.9) 18.2-71.6 −0.45 29.2 (28.6, 29.8) 27.5 (24.0, 32.9) 18.2-71.6 0.04
Age (STI) 26.7 (25.3, 28.1) 25.0 (22.1, 28.5) 19.1-51.4   29.5 (27.9, 31.1) 27.6 (24.5, 33.9) 19.1-51.4  
Poverty (No STI) 18.4 (17.2, 19.6) 13.8 (8.8, 25.9) 0.5-73.9 0.15 18.6 (17.4, 19.9) 13.9 (8.8, 26.3) 0.5-73.9 −0.04
Poverty (STI) 20.4 (17.3, 23.4) 18.2 (9.9, 29.7) 1.5-73.9   18.1 (15.2, 20.9) 14.5 (8.5, 26.6) 1.5-73.9