Table 5 Comparison of means of covariates between BIB P1s and BIB P2s, before and after matching on propensity score
Mean | % of bias | |||
|---|---|---|---|---|
BIB P2 (exposed) | BIB P1 (unexposed) | |||
Age | Unmatched | 28.28 | 29.61 | −28.7 |
Matched | 28.48 | −4.4 | ||
Ethnicity | Unmatched | 1.83 | 1.80 | 4.2 |
Matched | 1.81 | 3.5 | ||
Education | Unmatched | 2.48 | 2.54 | −4.7 |
Matched | 2.64 | −12.1 | ||
Questionnaire date | Unmatched | 999.48 | 661.77 | 105.7 |
Matched | 1012.6 | −4.1 | ||