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Table 1 Characteristics of the study cohort stratified by occupancy on the day of admission

From: The association between mechanical ventilator compatible bed occupancy and mortality risk in intensive care patients with COVID-19: a national retrospective cohort study

 

Occupancy

 

0–45%

45–85%

85–100%

Overall

(n = 1602)

(n = 4442)

(n = 1089)

(n = 7133)

Age in years

 Median [IQR]

60 [51, 69]

60 [51, 69]

60 [52, 68]

60 [51, 69]

Time in days to ICU from hospital admission

 Median [IQR]

1 [0, 4]

1 [0, 3]

1 [0, 3]

1 [0, 3]

Age group

 18–24

13 (0.8)

45 (1.0)

11 (1.0)

69 (1.0)

 25–34

71 (4.4)

148 (3.3)

37 (3.4)

256 (3.6)

 35–44

134 (8.4)

365 (8.2)

81 (7.4)

580 (8.1)

 45–54

331 (20.7)

894 (20.1)

227 (20.8)

1452 (20.4)

 55–64

443 (27.7)

1381 (31.1)

340 (31.2)

2164 (30.3)

 65–74

393 (24.5)

1084 (24.4)

293 (26.9)

1770 (24.8)

 75–84

193 (12.0)

452 (10.2)

87 (8.0)

732 (10.3)

 85+

24 (1.5)

73 (1.6)

13 (1.2)

110 (1.5)

Sex

 Female

545 (34.0)

1402 (31.6)

320 (29.4)

2267 (31.8)

 Male

1057 (66.0)

3040 (68.4)

769 (70.6)

4866 (68.2)

Ethnicity

 White

1088 (67.9)

2628 (59.2)

506 (46.5)

4222 (59.2)

 Asian subcontinent

120 (7.5)

466 (10.5)

137 (12.6)

723 (10.1)

 Asian (other)

75 (4.7)

260 (5.9)

85 (7.8)

420 (5.9)

 Black

61 (3.8)

286 (6.4)

113 (10.4)

460 (6.4)

 Mixed

14 (0.9)

77 (1.7)

37 (3.4)

128 (1.8)

 Other

76 (4.7)

264 (5.9)

69 (6.3)

409 (5.7)

 Missing

168 (10.5)

461 (10.4)

142 (13.0)

771 (10.8)

Obesity

 Obese

652 (40.7)

1766 (39.8)

454 (41.7)

2872 (40.3)

 Non-obese

520 (32.5)

1665 (37.5)

312 (28.7)

2497 (35.0)

 Missing

430 (26.8)

1011 (22.8)

323 (29.7)

1764 (24.7)

Comorbidity

 Diabetes

366 (22.8)

1184 (26.7)

304 (27.9)

1854 (26.0)

 Chronic respiratory disease(s)

378 (23.6)

902 (20.3)

226 (20.8)

1506 (21.1)

 Chronic heart disease

194 (12.1)

548 (12.3)

103 (9.5)

845 (11.8)

 Chronic renal disease

124 (7.7)

384 (8.6)

78 (7.2)

586 (8.2)

 Chronic neurological disease

105 (6.6)

216 (4.9)

37 (3.4)

358 (5.0)

 Chronic liver disease

81 (5.1)

91 (2.0)

18 (1.7)

190 (2.7)

 Immunosuppressive disease

61 (3.8)

146 (3.3)

20 (1.8)

227 (3.2)

 Hypertension

534 (33.3)

1576 (35.5)

328 (30.1)

2438 (34.2)

Invasive mechanical ventilation

 Proportion ventilated

699 (43.6)

2296 (51.7)

666 (61.2)

3661 (51.3)

Mortality

 Crude (unadjusted, absolute)

522 (32.6)

1654 (37.2)

461 (42.3)

2637 (37.0)

  1. Continuous covariates are presented with their median and interquartile range, whilst categorical covariates are presented with their frequency and within column percentage prevalence