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. 2021 Jan 13;21:53. doi: 10.1186/s12884-020-03518-2

Table 2.

Comparison of treatment between clamp and control groups

Clamp group
(n = 22)
Control group
(n = 25)
P value
Bleeding in labor (n = 27) (n = 12) (n = 15)
 Intrapartum blood loss (g), mean (SD) 656.2±72.79 811.8±86.07 .001a
Bleeding in the ward (n = 20) (n = 10) (n= 10)
 Blood loss in 30 min (g), mean (SD) 42.8±6.60 126.3±86.97 .007a
 Blood loss in 30~60 min (g), mean (SD) 10.4±1.96 21.88±2.30 .000a
Hemoglobin (g/L),mean (SD)
 Preoperative Hb 119±4.10 121.4±4.19 .058
 Postoperative Hb 96.9±8.33 96.1±7.39 .718
Blood transfusion, n(%) 2 (9.1%) 3 (12%) .746
Repeated usage of uterotonic, n(%) .001a
 ≤2 (type/time) 18 (81.8%) 9 (36%)
 ≥3 (type/time) 4 (18.2%) 16 (64%)
Uterotonic side effect, n(%) 4 (18.2%) 12 (48%) .031a
Clamp complications, n(%) 0
Surgical procedures, n(%)
 Intrauterine Bakri balloon 1 (4.5%) 3 (12%) .36a
 Urgent UAE 1 (4.5%) 1 (4.0%) .93a
 Laparotomy 0 0
Hospital stay (days), mean (SD) 4.1±1.57 3.8±1.61 .535

Abbreviations: Hb Hemoglobin, UAE Uterine artery embolization, SD Standard deviation; a Denotes significant values if p < 0.05