J Clin Gynecol Obstet

Journal of Clinical Gynecology and Obstetrics, ISSN 1927-1271 print, 1927-128X online, Open Access

Article copyright, the authors; Journal compilation copyright, J Clin Gynecol Obstet and Elmer Press Inc

Journal website http://www.jcgo.org

Original Article

Volume 8, Number 2, June 2019, pages 39-43

Tendency Prediction for Atonic Bleeding Following a Problem-Free Pregnancy

Figure

Figure 1. NRI and IDI of final model versus other factors. A multivariate logistic regression (stepwise selection method) was used to establish the parsimonious model for bleeding risk prediction, which was adjusted for background information. Predictive abilities were assessed using ROC and AUC. The NRI and IDI between the final model and other models (FF model, MD model and intrapartum model) were calculated.

Tables

**Table 1.** Comparison of Clinical Features Predictive of Blood Loss Over 800 mL During Delivery
	Bleeding < 800 mL (n = 1,325)	Bleeding ≥ 800 mL (n = 141)	P value
Age (years)	33.3 ± 4.4	35.1 ± 4.6	< 0.01
Gestational weeks (weeks)	39.1 ± 1.1	39.6 ± 1.1
Weight at first pregnancy trimester (kg) (a)	52.0 ± 6.9	54.0 ± 8.1
Weight at the last examination (kg) (b)	61.1 ± 7.1	63.4 ± 7.5
Difference in weight (a - b) (kg)	9.2 ± 2.8	9.5 ± 3.1
Height (cm)	159.1 ± 5.2	159.8 ± 5.2
BMI at first pregnancy trimester	20.5 ± 2.5	21.2 ± 3.3
BMI at the last examination	24.1 ± 2.6	24.9 ± 3.0
Weight of new-born (g)	3,011.4 ± 343.2	3,237.8 ± 357.8	< 0.01
Head circumference of new-born (cm)	32.9 ± 1.4	33.5 ± 1.4	< 0.01
Apgar score 1 min	8.7 ± 0.8	8.5 ± 1.0
Apgar score 5 min	9.5 ± 0.6	9.4 ± 0.6
Duration of labor (min)	553.8 ± 423.1	685.6 ± 568.7
Duration of second stage (min)	51.2 ± 35.4	54.3 ± 45.4
Duration of third stage (min)	4.8 ± 3.0	5.0 ± 4.8
Instrumental labor (%)	12.3 %	35.5 %	< 0.01
IVF/ICSI pregnancy (%)	15.3 %	46.1 %	< 0.01

**Table 2.** The Multivariate Logistic Regression Coefficients and Adjusted OR for the Final Model
Variable	Estimated regression coefficient	Adjusted OR (95% CI)	P value
Weight of new-born	0.0016	1.0016 (1.0011, 1.0022)	< 0.001
Instrumental labor
No	Reference
Yes	0.91	2.48 (1.64, 3.77)	< 0.001
Method of conception (ART)
No	Reference
Yes	1.29	3.63 (2.46, 5.36)	< 0.001