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Table 2 Baseline patient characteristics, stratified by time of ICU admission

From: Association between afterhours admission to the intensive care unit, strained capacity, and mortality: a retrospective cohort study

Characteristic

Total

(n = 12,265, 100%)

Workhours

(n = 8014, 65.3%)

Afterhours

(n = 4251, 34.7%)

p value

Age, median (IQR)

59 (46–70)

60 (47–70)

58 (44–70)

<.0001

Age category, n (%)

   

0.0022

 < 65 years

7680 (62.6)

4934 (61.6)

2746 (64.6)

 

 65–74 years

2458 (20.1)

1674 (20.9)

784 (18.5)

 

 75–84 years

1696 (13.8)

1132 (14.1)

564 (13.3)

 

 ≥ 85 years

426 (3.5)

270 (3.4)

156 (3.7)

 

Sex, n (%)

   

0.29

 Female

5112 (41.7)

3367 (42.0)

1745 (41.1)

 

 Male

7150 (58.3)

4644 (58.0)

2506 (59.0)

 

System, n (%)

   

<.0001

 Cardiovascular

2103 (17.3)

696 (16.5)

696 (16.5)

 

 Gastrointestinal

2044 (16.8)

677 (16.0)

677 (16.0)

 

 Genitourinary

449 (3.7)

136 (3.2)

136 (3.2)

 

 Hematology

65 (0.5)

24 (0.6)

24 (0.6)

 

 Metabolic/endocrine

246 (2.0)

85 (2.0)

85 (2.0)

 

 Musculoskeletal/skin

485 (4.0)

144 (3.4)

144 (3.4)

 

 Neurologic

1809 (14.9)

679 (16.1)

679 (16.1)

 

 Respiratory

3643 (29.9)

1216 (28.8)

1216 (28.8)

 

 Transplant

129 (1.1)

52 (1.2)

52 (1.2)

 

 Trauma

1211 (9.9)

519 (12.3)

519 (12.3)

 

Surgery, n (%)

   

<.0001

 Elective

1209 (9.9)

962 (12.0)

247 (5.8)

 

 Emergent

2054 (16.8)

1276 (15.9)

778 (18.3)

 

 Nonoperative

9002 (73.4)

5776 (72.1)

3226 (75.9)

 

Class, n (%)

   

<.0001

 Medical

7241 (59.0)

4701 (58.7)

2540 (59.8)

 

 Neurological

851 (6.9)

501 (6.3)

350 (8.2)

 

 Surgical

3101 (25.3)

2203 (27.5)

898 (21.1)

 

 Trauma without head injury

647 (5.3)

379 (4.7)

268 (6.3)

 

 Trauma with head injury

425 (3.5)

230 (2.9)

195 (4.6)

 

Comorbidity disease, n (%)

 Chronic dialysis

423 (3.5)

273 (3.4)

150 (3.5)

0.72

 Hepatic

1264 (10.3)

817 (10.2)

447 (10.5)

0.58

 Neurologic

5298 (43.2)

3303 (41.2)

1995 (46.9)

<.0001

 AIDS

65 (0.5)

42 (0.5)

23 (0.5)

0.90

 Chronic heart failure

762 (6.2)

512 (6.4)

250 (5.9)

0.27

 Respiratory

1415 (11.5)

942 (11.8)

473 (11.1)

0.30

 Metastatic/leukemia/lymphoma

791 (6.5)

543 (6.8)

248 (5.8)

0.043

 Immune suppression

1095 (8.9)

736 (9.2)

359 (8.5)

0.17

 Diabetes

2280 (18.6)

1535 (19.2)

745 (17.5)

0.027

 Cirrhosis

785 (6.4)

526 (6.6)

259 (6.1)

0.31

 Cardiovascular

5752(46.9)

3739 (46.7)

2013 (47.4)

0.47

 Digestive

2210 (18.0)

1449 (18.1)

761 (17.9)

0.80

 Acute renal

2869 (23.4)

1900 (23.7)

969 (22.8)

0.26

Charlson Index, median, (IQR)

1 (0-2)

1 (0-2)

1 (0-2)

<.0001

Admission APACHE II score, mean (SD)

20.2 (8.4)

19.9 (8.3)

20.9 (8.6)

<.0001

  1. AIDS acquired immune deficiency syndrome, APACHE acute physiology and chronic health evaluation, ICU intensive care unit, IQR interquartile range, SD standard deviation