a decreasing trendp<0.001
Normal delivery The ratio of normal vaginal deliveries showed a decreasing trend during the study years (unadjusted b=−0.94, p<0.001; adjusted b=−0.81, p=0.026), as well as before and after the intervention (unadjusted b=−7.41, p=0.008; adjusted b=−7.07, p=0.006).