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Table 1 Hospital categorisation, number of deliveries (n, %, mean), number and range of deliveries during defined quiet, optimal and busy days in different sized hospital categories (C1-C5)

From: Busy day effect on intrapartum adverse maternal outcomes – a population‐based study of 601 247 singleton deliveries

Total number of deliveries

Quiet day

Optimal day

Busy day

Hospital category

Hospitals/

category (n)

Deliveries (n, %)

Deliveries/day (mean)

Number (n, %) and range of daily deliveries (n)

Number (n, %) and range of daily deliveries (n)

Number (n, %) and range of daily deliveries (n)

C1

7

55 448 (9.2)

2.0

7 212 (13.0)

1

44 056 (79.5)

2–5

4 180 (7.5)

6–10

C2

10

165 573 (27.5)

4.6

14 200 (8.6)

1–2

136 711 (82.6)

3–8

14 662 (8.9)

9–16

C3

2

54 574 (9.1)

4.5

5 303 (9.7)

1–4

42 698 (78.2)

5–11

6 573 (12.0)

12–24

C4

2

108 254 (18.0)

13.5

9 731 (9.0)

1–8

88 156 (81.4)

9–23

10 367 (9.6)

24–34

C5

5

217 398 (36.2)

10.8

24 613 (11.3)

1–7

171 148 (78.7)

8–18

21 637 (10.0)

19–30

Total

26

601 247 (100.0)

7.1

61 059 (10.2)

1–8

482 769 (80.3)

2–23

57 419 (9.5)

6–34

  1. C1 = < 1000 deliveries annually, C2 = 1000–1999 deliveries annually, C3 = 2000–2999 deliveries annually, C4 = ≥ 3000 deliveries annually, C5 = University hospitals