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Table 1 Cohort study: baseline patient characteristics and clinical outcomes in each arm

From: When to perform curettage after uterine artery embolization for cesarean scar pregnancy: a clinical study

Variable

Total

Interval between UAE and curettage

P value

Arm 1

Arm 2

Arm 3

Arm 4

≤24 h

24-48 h

48-72 h

> 72 h

N = 314

N = 60

N = 103

N = 89

N = 62

Maternal age (years)a

32.4 ± 3.8

33.3 ± 4.3

31.8 ± 4.8

32.8 ± 4.9

31.4 ± 5.3

0.074

Gravidityb

4 (1-12)

5 (2-11)

4 (1-11)

4 (2-9)

4 (1-12)

0.870

Parityb

1 (1-3)

1 (1-3)

1 (1-3)

1 (1-3)

1 (1-3)

0.978

Number of prior CSb

1 (1-3)

1 (1-3)

1 (1-3)

1 (1-3)

1 (1-2)

0.981

Interval between CS and CSP (years)a

5.8 ± 3.9

6.4 ± 3.9

5.4 ± 3.9

6.0 ± 4.0

5.2 ± 3.8

0.209

Recurrent CSP (number, %)c

11 (3.5%)

5 (8.3%)

3 (2.9%)

1 (1.1%)

2 (3.2%)

0.125

Fetal heart beat (number, %)c

112 (35.7%)

26 (43.3%)

38 (36.9%)

29 (32.6%)

19 (30.6)

0.450

β-hCG level (*10^5mIU/mL)a

5.79 ± 6.93

6.40 ± 4.76

4.76 ± 4.47

6.08 ± 9.33

6.52 ± 8.04

0.323

Gestational age (days)a

51.3 ± 10.9

50.0 ± 8.8

51 ± 10.9

52.1 ± 12.2

52.0 ± 11.2

0.645

Maximum diameter of CSP mass (cm)a

3.2 ± 1.6

3.2 ± 1.7

3.1 ± 1.6

3.3 ± 1.6

3.0 ± 1.4

0.624

Median diameter of CSP mass (cm)a

2.4 ± 1.3

2.4 ± 1.2

2.5 ± 1.3

2.6 ± 1.4

2.4 ± 1.3

0.797

Minimum diameter of CSP mass (cm)a

1.8 ± 1.2

1.7 ± 1.1

1.9 ± 1.1

2.0 ± 1.3

1.9 ± 1.2

0.730

Myometrial thickness (cm)a

0.11 ± 0.08

0.11 ± 0.09

0.11 ± 0.09

0.11 ± 0.08

0.11 ± 0.08

0.978

Rich blood supply (number, %)c

56 (17.8%)

10 (16.7%)

24 (23.3%)

15 (16.9%)

7 (11.3%)

0.131

Type of CSP

 Type I (number, %)c

263 (83.8%)

54 (90%)

85 (82.5%)

70 (78.7%)

54 (87.1%)

0.252

 Type II (number, %)c

51 (16.2%)

6 (10%)

18 (17.5%)

19 (21.3%)

8 (12.9%)

Clinical outcome

Intraoperative blood loss (mL)a

66.7 ± 160.1

44.5 ± 120.1

47.6 ± 136.5

82.2 ± 199.9

99.6 ± 162.6

0.039

   ≥ 200 mL (number, %)c

32 (10.2%)

3 (5%)

8 (7.8%)

9 (10.1%)

12 (19.4%)

0.044

Complications (number, %)c

46 (14.6%)

4 (6.7%)

12 (11.7%)

14 (15.7%)

16 (25.8%)

0.018

Hospital stay (days)a

5.8 ± 2.5

4.3 ± 1.4

5.2 ± 1.5

5.8 ± 1.6

8.4 ± 3.7

0.000

  1. amean ± standard deviation, tested by analysis of variance; bmedian (interquartile range), analyzed by rank sum tests; c analyzed by Kruskal- Wallis tests; CS cesarean section, CSP cesarean scar pregnancy, hCG human chorionic gonadotrophin, UAE uterine artery embolization