Variable | Unmatched | Per cent (%) | Bias (%) | Reduced bias (%) | t-test | ||
---|---|---|---|---|---|---|---|
Matched | Treated | Control | t | p | |||
Age category in years:  15–20 | Unmatched | 21.1 | 25.3 | − 10.0 | 88.9 | − 2.04 | 0.042 |
Matched | 23.5 | 24.0 | − 1.1 | − 0.20 | 0.844 | ||
 21–25 | Unmatched | 33.0 | 31.0 | 4.3 | − 55.7 | 0.89 | 0.376 |
Matched | 34.5 | 31.4 | 6.7 | 1.19 | 0.234 | ||
 26–30 | Unmatched | 34.1 | 30.2 | 8.4 | 0.1 | 1.73 | 0.085 |
Matched | 28.7 | 32.7 | − 8.3 | − 1.52 | 0.129 | ||
 ≥30 | Unmatched | 11.7 | 13.5 | − 5.2 | 26.9 | − 1.05 | 0.293 |
Matched | 13.2 | 11.9 | 3.8 | 0.68 | 0.499 | ||
Ever attended school | Unmatched | 71.7 | 66.5 | 11.3 | 78.9 | 2.30 | 0.021 |
Matched | 69.5 | 68.4 | 2.4 | 0.42 | 0.672 | ||
Gestational age: Â First trimester | Unmatched | 7.3 | 5.7 | 6.2 | 79.5 | 1.28 | 0.200 |
Matched | 5.7 | 5.3 | 1.3 | 0.25 | 0.806 | ||
 Second trimester | Unmatched | 35.7 | 37.2 | − 3.2 | − 50.6 | − 0.66 | 0.507 |
Matched | 35.3 | 37.7 | − 4.9 | − 0.87 | 0.383 | ||
 Third trimester | Unmatched | 57.1 | 57.0 | 0.1 | − 6040.7 | 0.01 | 0.989 |
Matched | 59.0 | 57.0 | 4.1 | 0.74 | 0.461 | ||
First-time pregnancy | Unmatched | 33.7 | 33.9 | − 0.6 | − 698.4 | − 0.13 | 0.899 |
Matched | 36.6 | 34.2 | 5.0 | 0.88 | 0.380 | ||
ANC visit is first | Unmatched | 44.3 | 47.1 | − 5.6 | 55.0 | − 1.15 | 0.252 |
Matched | 44.1 | 45.4 | − 2.5 | − 0.45 | 0.652 | ||
Facility is urban | Unmatched | 83.4 | 70.7 | 30.4 | 97.5 | 6.12 | 0.000 |
Matched | 81.3 | 81.0 | 0.8 | 0.14 | 0.886 | ||
The facility owner is government | Unmatched | 87.1 | 82.4 | 13.3 | 50.5 | 2.68 | 0.007 |
Matched | 85.9 | 88.2 | − 6.6 | − 1.25 | 0.211 | ||
Facility is hospital or health centre | Unmatched | 97.1 | 95.6 | 7.6 | 55.8 | 1.53 | 0.127 |
Matched | 96.9 | 97.5 | − 3.4 | − 0.68 | 0.499 | ||
Facility is supervised at the zonal level | Unmatched | 47.9 | 55.4 | − 15.3 | 85.6 | − 3.13 | 0.002 |
Matched | 53.2 | 52.1 | 2.2 | 0.39 | 0.695 | ||
ANC provider is Nurse or Midwife | Unmatched | 87.1 | 83.8 | 9.6 | 95.3 | 1.94 | 0.052 |
Matched | 85.9 | 85.7 | 0.4 | 0.08 | 0.936 | ||
HMIS is available | Unmatched | 97.2 | 93.5 | 17.8 | 95.8 | 3.52 | 0.000 |
Matched | 96.9 | 96.7 | 0.7 | 0.16 | 0.874 |