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Table 3 Testing for differential pre-trends in outcome variables

From: The effect of increasing the supply of skilled health providers on pregnancy and birth outcomes: evidence from the midwives service scheme in Nigeria

  Number δ (95 % CI) p-value
Antenatal care in study clinic 1094 0.002 (−0.020, 0.025) 0.854
Any antenatal care 1091 0.009 (−0.011, 0.029) 0.371
4+ antenatal visits 1094 0.003 (−0.021, 0.028) 0.783
Delivery in study clinic 1094 0.004 (−0.019, 0.026) 0.761
Institutional delivery 1094 0.005 (−0.018, 0.028) 0.684
Skilled birth attendance 1094 −0.001 (−0.023, 0.021) 0.916
Intra-partum complications 1094 0.014 (−0.004, 0.032) 0.126
Post-partum complications 1094 0.008 (−0.005, 0.021) 0.213
  1. δ denotes the differential linear trend in intervention communities relative to comparison communities over the period prior to the start of the MSS. The regression specification controls for community fixed effects. Standard errors in parentheses are clustered at the community level