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Table 1 Comparison of the clinicopathological characteristics between the intensivist and non-intensivist groups

From: Intensivist coverage and critically ill COVID-19 patient outcomes: a population-based cohort study

Variable

Intensivist group nā€‰=ā€‰2653

Non-intensivist group nā€‰=ā€‰10,450

P-value

Age, year

67 [52, 75]

65 [51, 74]

<ā€‰0.001

Male sex

1607 (60.6)

5808 (55.6)

<ā€‰0.001

Having a job

1460 (55.0)

5813 (55.6)

0.582

Household income level

Ā Ā 

0.190

Ā Medical aid group

253 (9.5)

964 (9.2)

Ā 

Ā Q1 (lowest)

488 (18.4)

1869 (17.9)

Ā 

Ā Q2

457 (17.2)

1874 (17.9)

Ā 

Ā Q3

523 (19.7)

2256 (21.6)

Ā 

Ā Q4 (highest)

907 (34.2)

3373 (32.3)

Ā 

Ā Unknown

25 (0.9)

114 (1.1)

Ā 

Residence

Ā Ā 

<ā€‰0.001

Ā Urban area

1519 (57.3)

5355 (51.2)

Ā 

Ā Rural area

1134 (42.7)

5095 (48.8)

Ā 

Type of infection route

Ā Ā 

<ā€‰0.001

Ā Inflow from foreign countries

36 (1.4)

135 (1.3)

Ā 

Ā Contact with person-related inflow from foreign countries

1 (0.0)

4 (0.0)

Ā 

Ā Outbreak in hospitals or nursing care centers

311 (11.7)

1581 (15.1)

Ā 

Ā Outbreak in local communities

322 (12.1)

1216 (11.6)

Ā 

Ā Contact with a patient confirmed with patients

722 (27.2)

3163 (30.3)

Ā 

Ā Unknown

1,261 (47.5)

4351(41.6)

Ā 

Ā CCI, point

5.5 [3.4, 6.4]

5.8 [3.8, 6.6]

0.020

Underlying disability

Ā Ā 

0.166

Ā Severe

208 (7.8)

941 (9.0)

Ā 

Ā Mild to moderate

284 (10.7)

1099 (10.5)

Ā 

Hospital level group

Ā Ā 

<ā€‰0.001

Ā A

312 (11.8)

4,158 (39.8)

Ā 

Ā B

185 (7.0)

529 (5.1)

Ā 

Ā C

2,072 (78.1)

5,137 (49.2)

Ā 

Ā D

84 (3.2)

626 (6.0)

Ā 

Total case volume of ICU admission due to COVID-19

Ā Ā 

<ā€‰0.001

Ā Q1:0ā€“150

1115 (42.0)

2221 (21.3)

Ā 

Ā Q2:151ā€“257

660 (24.9)

2632 (25.2)

Ā 

Ā Q3:258ā€“408

657 (24.8)

2687 (25.7)

Ā 

Ā Q4:ā€‰ā‰„ā€‰409

221 (8.3)

2910 (27.8)

Ā 

1st vaccination

1559 (58.8)

6824 (65.3)

<ā€‰0.001

2nd vaccination

1378 (51.9)

6271 (60.0)

<ā€‰0.001

3rd vaccination

692 (26.1)

3485 (33.3)

<ā€‰0.001

WHO clinical progression scale

Ā Ā Ā 

Ā 1 point (no oxygen therapy)

451 (17.1)

1672 (16.0)

0.215

Ā 2 points (oxygen by mask or nasal prongs)

944 (35.6)

3887 (37.2)

<ā€‰0.001

Ā 3 points (oxygen by NIV or HFNC)

565 (21.3)

1818 (17.4)

<ā€‰0.001

Ā 4 points (intubation and MV)

384 (14.5)

1285 (12.3)

<ā€‰0.001

Ā 5 points (MV with vasopressor use)

208 (7.8)

1642 (15.7)

<ā€‰0.001

Ā 6 points (MV and vasopressor use, dialysis or ECMO)

101 (3.8)

146 (1.4)

<ā€‰0.001

Diagnosis of ARDS

326 (12.3)

741 (7.1)

<ā€‰0.001

In-hospital mortality

715 (27.0)

1990 (19.0)

<ā€‰0.001

  1. Median value with interquartile range was used for continuous variable and number with percentage was used for categorical variable
  2. COVID-19, Coronavirus disease-2019; CCI, Charlson comorbidity index; LOS, length of hospital stays; ICU, intensive care unit; WHO, world health organization; NIV. Noninvasive ventilation; HFNC, high flow nasal cannula; MV, mechanical ventilation; ECMO, extracorporeal membrane oxygenation; ARDS, acute respiratory distress syndrome