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Table 1 Characteristics of hospitals and craniotomy patients

From: Association between registered nurse staffing levels and in-hospital mortality in craniotomy patients using Korean National Health Insurance data

Variables

Categories

Hospitals (n = 203)

Craniotomy patients (n = 46,779)

n (%)

n (%)

Type

Tertiary hospital

43(21.2)

29,424(62.9)

General hospital

160(78.8)

17,355(37.1)

Ownership

Public sector

24(11.8)

8013(17.1)

Educational foundation

59(29.1)

21,394(45.7)

Medical or other corporation

93(45.8)

15,107(32.3)

Private corporation

27(13.3)

2265(4.8)

Location

Capital (Seoul)

43(21.2)

18,362(39.3)

Metropolitan cities

54(26.6)

12,929(27.6)

Other cities and rural areas

106(52.2)

15,488(33.1)

Number of craniotomy cases per year

10–49

99(48.8)

2833(6.1)

50–99

41(20.2)

6069(13.0)

100–499

41(20.2)

14,478(31.0)

500

22(10.8)

23,399(50.0)

Number of beds per physician

<  2

14(6.9)

15,168(32.4)

2 ≤ and < 4

46(22.7)

17,639(37.7)

4 ≤ and < 6

55(27.1)

8991(19.2)

≥ 6

88(43.4)

4981(10.7)

Registered Nurse (RN) staffing level

Bed-to-RN ratio in general wards (grade)

< 2.5 (0–1)

29(14.3)

21,821(46.7)

2.5 ≤ and < 3.5 (2–3)

108(53.2)

22,517(48.1)

3.5 ≤ and < 4.5 (4–5)

29(14.3)

783(1.7)

≥4.5 (6–7)

37(18.2)

1658(3.5)

Bed-to-RN ratio in the ICUs (grade)

< 0.63 (1–2)

48(23.7)

29,408(62.9)

0.63 ≤ and <  0.88 (3–4)

64(31.5)

12,023(25.7)

0.88 ≤ and <  1.25 (5–6)

53(26.1)

3879(8.3)

≥1.25 (7–9)

38(18.7)

1469(3.1)

Bed-to-RN ratio in the hospitals overall

< 1.25

43(21.2)

24,687(52.8)

1.25 ≤ and <  1.67

54(26.6)

13,920(29.8)

1.67 ≤ and <  2.50

54(26.6)

4764(10.2)

≥ 2.50

52(25.6)

3408(7.3)