Table 2 The distribution of blood oxygen saturation level and disease outcome in patients with COVID-19

 0–9

3158

3.2

5717

5.4

< 0.001

311

1.5

8564

4.6

< 0.001

 10–19

791

0.8

2767

2.6

110

0.5

3448

1.9

 20–29

3094

3.1

10601

10.0

234

1.1

13461

7.3

 30–39

9067

9.1

20610

19.4

695

3.4

28982

15.7

 40–49

12241

12.3

18034

16.9

1342

6.6

28933

15.6

 50–59

17845

18.0

16464

15.5

2625

12.8

31684

17.1

 60–69

20928

21.1

14881

14.0

4622

22.6

31187

16.8

 70–79

17684

17.8

10258

9.6

5110

25.0

22832

12.3

 80 and over

14353

7.0

7161

3.5

5425

26.5

16089

8.7

 Women

43053

43.4

50559

47.5

< 0.001

8326

40.7

85286

46.1

< 0.001

 Men

56108

56.6

55934

52.5

12148

59.3

99894

53.9

 West

32089

32.4

37805

35.5

< 0.001

6159

30.1

63735

34.4

< 0.001

 Central, South

19738

19.9

29566

27.8

4707

23.0

44597

24.1

 North, East

47334

47.7

39122

36.7

9608

46.9

76848

41.5

Positive history of smoking

1522

1.5

1634

1.5

0.99

316

1.5

2840

1.5

0.91

Positive history of opioids

1075

1.1

826

0.8

< 0.001

275

1.3

1626

0.9

< 0.001

Positive history of exposure to SARS-CoV-2

39671

40.0

28746

27.0

< 0.001

7154

34.9

61263

33.1

< 0.001

 Diabetes

12012

12.1

8163

7.7

< 0.001

3188

15.6

16987

9.2

< 0.001

 Hypertension

13164

13.3

7682

7.2

< 0.001

3241

15.8

17605

9.5

< 0.001

 CVD

10960

11.1

8395

7.9

< 0.001

3148

15.4

16207

8.8

< 0.001

 Cancer

2133

2.2

1936

1.8

< 0.001

786

3.8

3283

1.8

< 0.001

 Asthma

1590

1.6

1144

1.1

< 0.001

271

1.3

2463

1.3

0.93

 Chronic respiratory diseases

2023

2.0

1133

1.1

< 0.001

556

2.7

2600

1.4

< 0.001

 Chronic liver diseases

466

0.5

498

0.5

0.93

141

0.7

823

0.4

< 0.001

 Chronic kidney diseases

2488

2.5

1765

1.7

< 0.001

920

4.5

3333

1.8

< 0.001

 Chronic neurological diseases

1120

1.1

767

0.7

< 0.001

351

1.7

1536

0.8

< 0.001

 Chronic immune deficiency diseases

303

0.3

323

0.3

0.92

68

0.3

558

0.3

0.44

 Chronic haematological diseases

505

0.5

508

0.5

0.29

158

0.8

855

0.5

< 0.001

 HIV/AIDS

86

0.1

68

0.1

0.05

32

0.2

122

0.1

< 0.001

 Fever

37864

38.2

35515

33.3

< 0.001

7134

34.8

66245

35.8

0.008

 Cough

45873

46.3

49765

46.7

0.03

7943

38.8

87695

47.4

< 0.001

 Muscle ache

27006

27.2

34088

32.0

< 0.001

4700

23.0

56394

30.5

< 0.001

 Difficulty breathing

55060

55.5

33884

31.8

< 0.001

12839

62.7

76105

41.1

< 0.001

 Chest pain

2692

2.7

2617

2.5

< 0.001

566

2.8

4743

2.6

0.08

 Loss of smell

1730

1.7

2234

2.1

< 0.001

250

1.2

3714

2.0

< 0.001

 Loss of taste

1149

1.2

1349

1.3

0.02

169

0.8

2329

1.3

< 0.001

 Loss of appetite

5476

5.5

4638

4.4

< 0.001

1110

5.4

9004

4.9

< 0.001

 Nausea

4915

5.0

5188

4.9

0.37

793

3.9

9310

5.0

< 0.001

 Diarrhea

2621

2.6

3719

3.5

< 0.001

424

2.1

5916

3.2

< 0.001

 Headache

4940

5.0

6207

5.8

< 0.001

691

3.4

10456

5.6

< 0.001

 Vertigo

1839

1.9

1957

1.8

0.77

356

1.7

3440

1.9

0.23

 Impaired consciousness

6015

6.1

2061

1.9

< 0.001

3213

15.7

4863

2.6

< 0.001

 Seizure

262

0.3

415

0.4

< 0.001

67

0.3

610

0.3

0.95

 Paresis

429

0.4

371

0.3

0.002

132

0.6

668

0.4

< 0.001

 Paraplegia

143

0.1

113

0.1

0.01

44

0.2

212

0.1

< 0.001

 Skin lesions

89

0.1

112

0.1

0.26

16

0.1

185

0.1

0.34

Positive chest CT findings

66027

66.6

45819

43.0

< 0.001

13408

65.5

98438

53.2

< 0.001

Admitted to ICU

23912

24.1

12780

12.0

< 0.001

11011

53.8

25681

13.9

< 0.001