Table A4.

Adjusted OR and AUC with 95 % CI in the Predictive Model for Influencing Factors of PPH among Pregnant Multiparous Women in Hunan, China, during 2017–2018 (n = 84,159).

Variable	Multivariate logistic regression analysis			Single factor analysis in predictive model
	AOR	95 % CIs	P-value	AUC	95 % CIs	P-value
Number of ANC				0.509	0.485–––0.513	0.905
0–3 ANC visits	1.85	1.35–––2.53	≤0.001
4–9 ANC visits	0.84	0.74–––0.96	0.068
≥ 10 ANC visits (Ref.)		Ref.
Mode of Childbirth				0.569	0.555–––0.584	≤0.001
Normal vaginal birth/SVD(Ref.)		Ref.
Cesarean section	5.81	4.63–––7.27	≤0.001
Instrumental/Assisted	1.95	1.16–––3.28	0.041
Birth weight				0.501	0.449–––0.508	≤0.001
Normal birth weight (2500-3999 g) (Ref.)		Ref.
Low birth weight (<2500 g)	2.09	1.60–––2.72	≤0.001
Large birth weight (≥4000 g)	0.44	0.367––0.52	≤0.001
Anemia				0.733	0.720–––0.746	≤0.001
Yes	6.78	5.98–––7.69	≤0.001
No (Ref.)		Ref.
Gestational hypertension				0.507	0.492–––0.522	0.370
Yes	1.57	1.13–––2.19	0.003
No (Ref.)		Ref.
Placenta abruption				0.511	0.496–––0.526	0.146
Yes	3.62	2.31–––5.66	≤0.001
No (Ref.)		Ref.
Soft birth canal avulsion				0.519	0.503–––0.534	0.015
Yes	3.66	2.77–––4.82	≤0.001
No (Ref.)		Ref.
Hysterectomy				0.507	0.492–––0.522	0.370
Yes	2.59	1.73–––3.89	≤0.001
No (Ref.)		Ref.
General anesthesia used before birth				0.502	0.447–––0.507	≤0.001
Yes	1.63	1.33–––2.01	≤0.001
No (Ref.)		Ref.
Erythrocyte suspension transfusion before birth				0.613	0.596–––0.630	≤0.001
Yes	46.58	37.72–––57.54	≤0.001
No (Ref.)		Ref.

ANC: Antenatal Care, AOR: Adjusted odd ratio, AUC: Area under the curve, CI: Confidence Interval, SVD: Spontaneous Vaginal Delivery, Ref: Reference category, PPH: Postpartum Hemorrhage.

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