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Table 4 Comparison of the standardised differences of baseline characteristics before and after matching for ANC providers’ uptake of refresher training

From: The effect of national antenatal care guidelines and provider training on obstetric danger sign counselling: a propensity score matching analysis of the 2014 Ethiopia service provision assessment plus survey

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