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Table 1 Clinical characteristics at baseline according to the duration of the first prone session

From: Continuous prolonged prone positioning in COVID-19-related ARDS: a multicenter cohort study from Chile

 

Total (n = 417)

Group A (n = 191)

Group B (n = 128)

Group C (n = 98)

p-value

Age, years, median (IQR)

62 (52–68)

61 (52–68)

61 (47–67)

63 (54–69)

0.188

Sex, n (%)

 Male

301 (72.2)

135 (70.7)

95 (74.2)

71 (72.4)

0.796

 Female

116 (27.8)

56 (29.3)

33 (25.8)

27 (27.6)

0.796

Body mass index (kg/m2), median (IQR)

30 (27–34)

29 (26–33)

30 (26–34)

31 (27–35)

0.098

Comorbidities, n (%)

 Hypertension

232 (55.6)

108 (56.5)

70 (54.7)

54 (55.1)

0.951

 Type 2 diabetes mellitus

166 (39.8)

85 (44.5)

43 (33.6)

38 (38.8)

0.148

 Coronary heart disease

17 (4.1)

6 (3.1)

3 (2.3)

8 (8.2)

0.074

 Chronic liver disease

10 (2.4)

5 (2.6)

4 (3.1)

1 (1)

0.652

 Immunosuppression

6 (1.4)

5 (2.6)

1 (1)

0.144

 Chronic kidney disease

20 (4.8)

13 (6.8)

3 (2.3)

4 (4.1)

0.182

 Obesity

147 (35.3)

61 (31.9)

47 (36.7)

39 (39.8)

0.368

 Other

121 (29)

58 (30.4)

35 (27.3)

28 (28.6)

0.842

 None

63 (15.1)

32 (16.8)

18 (14.1)

13 (13.3)

0.712

APACHE II score, median (IQR)

14 (10–18)

14 (10–18)

14 (10–18)

13 (10–17)

0.748

SOFA score, median (IQR)

5 (4–7)

5 (4–8)

5 (4–7)

4 (4–6)

0.246

Sepsis, n (%)

100 (24.3)

37 (19.7)

29 (22.8)

34 (35.1)

0.017

Time between (days), median (IQR)

 Diagnosis to hospital admission

0 (0–3)

0 (0–3)

0 (0–4)

0 (0–1)

0.096

 Hospital to ICU admission

1 (0–3)

1 (0–3)

1 (0–3)

1 (0–4)

0.086

 Diagnosis to invasive ventilation

3 (1–6)

3 (0–6)

3 (1–7)

3 (1–5)

0.940

 Invasive ventilation to prone position

1 (0–1)

1 (0–2)

1 (0–2)

0 (0–1)

 < 0.001

  1. Group A patients remained 2–3 days in prone position during their first session. Group B patients remained 4–5 days in prone position during their first session. Group C patients remained more than 5 days in prone position during their first session
  2. APACHE II Acute Physiology and Chronic Health Disease Classification System II, SOFA Sepsis Related Organ Failure Assessment, Diagnosis COVID-19 diagnosis, ICU intensive care unit