Regression analysis of environmental factors and input slack variables for Stage 2 from 2010 to2016.

Descriptive statistics of environment variables from 2010 to 2016.

Sample characteristics for full-term and perinatal risk (PR) groups.

This study applied the non-parametric four-stage data envelopment analysis method (Four-Stage DEA) to measure the relative efficiencies of Chinese public hospitals from 2010 to...

Mild and moderate-to-high perinatal risk (compared to full-term) as predictors of child physical health outcomes across five sets of adjusted models.

Definitions and data source of input/output metrics and environmental variables.

Comparison between the relative efficiencies calculated by Four-Stage-DEA during step1 and step 4 during 2010–2016.