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Table 1 Characteristics of the study population according to transfer status for patients with COVID-19 hospitalized at an intensive care unit (ICU) in France between 1 March and 21 June 2020

From: Impact of ICU transfers on the mortality rate of patients with COVID-19: insights from comprehensive national database in France

 

All patients (n = 17,351)

Non-transferred (n = 15,303)

Intra-regional transfer (n = 1623)

Inter-regional and international transfer (n = 605)

P-value

Age, years (mean, (SD))

62.8 (15.2)

63.0 (15.5)

61.0 (13.2)

61.7 (10.9)

 < 0.0001

Men (%)

12,128 (69.2)

10,473 (68.4)

1,205 (74.3)

450 (74.4)

 < .0001

Period of admission

     

 01–22 March 2020, n (%)

3699 (21.1)

3098 (20.4)

409 (25.2)

192 (31.7)

 < 0.0001

 23–29 March 2020, n (%)

4874 (27.8)

4058 (26.5)

535 (33.0)

281 (46.5)

 

 30 March to 5 April 2020, n (%)

3374 (19.3)

2915 (19.0)

369 (22.7)

90 (14.9)

 

 06–19 April 2020, n (%)

3160 (18.0)

2947 (19.2)

197 (12.1)

16 (2.6)

 

 20 April to 21 June 2020, n (%)

2424 (13.8)

2285 (14.9)

113 (7.0)

26 (4.3)

 

Regions with high incidence, n (%)

11,975 (68.3)

10,203 (66.7)

1213 (74.7)

559 (92.4)

 < 0.0001

Hospital admission

     

 University teaching hospital, n (%)

6411 (36.6)

5690 (37.2)

515 (31.7)

206 (34.0)

 < 0.0001

 General public hospital, n (%)

7813 (44.6)

6630 (43.3)

820 (50.5)

363 (60.0)

 

 Private hospital, n (%)

3307 (18.8)

2983 (19.5)

288 (17.8)

36 (6.0)

 

Admission in ICU

     

 Directly from home, n (%)

11,190 (63.8)

9801 (64.1)

1031 (63.5)

358 (59.2)

0.0484

 Following hospital admission, n (%)

6341 (36.2)

5502 (39.9)

592 (36.5)

247 (40.8)

 

Length of stay in acute care prior ICU admission (days, (SD))

3.4 (5.2)

3.5 (5.4)

3.0 (3.9)

2.9 (3.5)

0.0486

Length of stay in ICU prior transfer, days (mean, (SD))

10.0 (12.9)

10.9 (14.1)

7.6 (8.3)

 < 0.0001

Second admission in ICU, n (%)

654 (3.7)

535 (3.5)

96 (5.9)

23 (3.8)

 < 0.0001

Length of stay in ICU, days (mean, (SD))

15.6 (16.6)

13.5 (14.6)

30.6 (21.8)

29.9 (19.3)

 < 0.0001

Distance of hospital transfer during ICU

     

 Less than 10 km, n (%)

632

630 (38.8)

2 (0.3)

 < 0.0001

 10–50 km, n (%)

678

658 (40.5)

20 (3.3)

 

 50–200 km, n (%)

442

318 (19.6)

124 (20.5)

 

 200 km and more, n (%)

476

17 (1.1)

459 (75.9)

 

Total length of stay in acute care, days (mean, (SD))

22.0 (18.7)

19.8 (17.0)

36.9 (22.7)

38.0 (20.1)

 < 0.0001

Outcome at the end of follow-up

     

 Still in ICU

91 (0.5)

71 (0.5)

14 (0.9)

6 (1.0)

 < 0.0001

 Still in acute care

65 (0.4)

49 (0.3)

10 (0.6)

6 (1.0)

 

 Rehabilitation, convalescent or long-term care and nursing home

3272 (18.6)

2543 (16.6)

488 (30.1)

241 (39.8)

 

 Home

9465 (54.0)

8464 (55.3)

736 (43.3)

265 (43.8)

 

 Death

4638 (26.5)

4176 (27.3)

375 (23.1)

87 (14.4)