Table 4 Comparison of the standardised differences of baseline characteristics before and after matching for ANC providers’ uptake of refresher training
Variable | Unmatched | Per cent (mean) | Bias (%) | Reduced bias (%) | t-test | ||
|---|---|---|---|---|---|---|---|
Matched | Treated | Control | t | p | |||
Age in years (mean) | Unmatched | 25.2 | 25.4 | − 3.7 | 38.0 | − 0.77 | 0.439 |
Matched | 25.3 | 25.2 | 2.3 | 0.43 | 0.665 | ||
School attendance | Unmatched | 68.5 | 68.9 | − 0.9 | − 337.1 | − 0.19 | 0.846 |
Matched | 68.9 | 70.8 | − 4.1 | − 0.77 | 0.444 | ||
Gestational age in weeks (mean) | Unmatched | 27.5 | 27.1 | 4.7 | 20.1 | 0.97 | 0.335 |
Matched | 27.0 | 27.3 | − 3.7 | − 0.69 | 0.490 | ||
First-time pregnancy | Unmatched | 37.3 | 30.6 | 14.3 | 100.0 | 2.97 | 0.003 |
Matched | 34.3 | 36.4 | 0.0 | 0.00 | 1.000 | ||
ANC visit is first | Unmatched | 45.2 | 46.7 | − 3.1 | − 22.6 | − 0.64 | 0.519 |
Matched | 48.0 | 46.1 | 3.8 | 0.70 | 0.482 | ||
Facility is urban | Unmatched | 82.6 | 70.0 | 29.9 | 94.2 | 6.16 | 0.000 |
Matched | 80.0 | 79.2 | 1.7 | 0.34 | 0.737 | ||
Facility owner is government | Unmatched | 82.9 | 85.6 | − 7.3 | 34.0 | − 1.51 | 0.129 |
Matched | 86.0 | 84.2 | 4.8 | 0.91 | 0.363 | ||
Facility is hospital or health centre | Unmatched | 95.2 | 97.1 | − 10.1 | 24.2 | − 2.10 | 0.036 |
Matched | 98.4 | 97.0 | 7.6 | 1.79 | 0.074 | ||
Facility is supervised at the zonal level | Unmatched | 50.7 | 53.7 | − 6.1 | 9.3 | − 1.27 | 0.204 |
Matched | 53.1 | 50.3 | 5.6 | 1.03 | 0.304 | ||
ANC provider is Nurse or Midwife | Unmatched | 83.8 | 86.3 | − 7.2 | 100.0 | − 1.50 | 0.134 |
Matched | 84.8 | 84.8 | 0.0 | 0.00 | 1.000 | ||