Proportion of population of characteristics and unweighted kappa for physician agreement of cause of death categorization, by covariate.

*Maternal mortality ratio by state of low (125 per 100 000 livebirth), medium (>126 254 per 100 000) and high (375 per 100 000) [24].*按低、中、高三个水平划分的孕产妇死亡率（maternal mortality ratio）：低危组为每10万活产125例，中危组为每10万活产126~254例，高危组为每10万活产375例[24]。