provider birth delivery richer survival category male wealth private married female excluded all woman when survived doctor model coefficients baseline order auxiliary urban data marital status factor after 971 means public 976 mode represent discharge midwife analyses wantedness day formerly 999 twins sensitivity vaginal characteristics ratio education child categories then multiple birthweight s3 models other 001 nurse age singleton reference covariates log grams adjusted higher attendant richest each regression 000 analysis related multivariable geometric later 032 association completed poorer transformed index length wanted facility value died accounting poorest 018 sex residence table years 500 currently middle sector level secondary none linear rural country staff stay 499 more need factors before cesarean main most primary missing never quintile between triplets