Table 1 Comparison of clinical characteristics between the Singleton and twin groups

Age (years)

35 (28–45)

36 (30–42)

Primipara

70 (90.9)

15 (65.2)

Gestational hypertension

4 (5.2)

1 (4.3)

Placenta previa or accreta spectrum

9 (11.7)

0 (0)

Emergency operation

27 (35.1)

11 (47.8)

Gestational age at delivery (weeks)

37.9 (16.9–40.6)

35.9 (25.1–38.0)

… Preterm birth (< 37 weeks)

25 (32.5)

18 (78.3)

Hb before delivery

12.4 (7.4–14.7)

11.8 (7.7–14.7)

Hb after delivery

10.3 (7.6–13.5)

10.5 (7.7–12.8)

Largest myoma size

4.0 (1.0–15.0)

4.5 (1.0–10.0)

…Largest size ≥ 5 cm

36 (46.8)

11 (47.8)

Myoma number

2 (1–10)

2 (1–8)

…Myoma number ≥ 3

18 (23.4)

3 (13.0)

Myoma type^a

…Subserosal

20/39 (51.3)

9/14 (64.3)

…Intramural

10/39 (25.6)

4/14 (28.6)

…Submucosal

0/39 (0)

1/14 (7.1)

…Multiple

8/39 (20.5)

2/14 (14.3)

Myoma location

…Anterior wall

53 (68.8)

12 (52.2)

…Posterior wall

7 (9.1)

5 (21.7)

…Multiple

17 (22.1)

6 (26.1)

Highest myoma weight (g)

45 (4–1104)

83 (14–425)

…Highest myoma weight ≥ 80 g

21/55 (38.2)

9/17 (52.9)

Vasopressin use

22 (28.6)

1 (4.3)

Barbed suture

18/74 (24.3)

2 (8.7)

Operative time (min)

105 (64–165)

97 (65–136)

Post-operative fever

37.8 (37.1–39.7)

37.7 (37.0–38.5)

Estimated blood loss

1,000 (500–2,000)

1,000 (700–1,700)

Transfusion

15 (19.5)

8 (34.8)

… pRBC units

0 (0–16)

1 (0–8)

… massive transfusion ≥ 10 units

2 (2.6)

0 (0)

Length of hospital stay (days)

4 (3–8)

4 (3–5)