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Table 2 Basic demographic parameters of patients in the included studies

From: High-flow nasal cannula oxygen therapy versus conventional oxygen therapy in patients with acute respiratory failure: a systematic review and meta-analysis of randomized controlled trials

Study

n

Age

(years)

Gender

(M/F)

Patients

Duration of HFNC or COT

Starting flow of HFNC

RRs

(breaths/min)

P/F

(mmHg)

Bell 2015

 HFNC group

48

72.9 ± 15.1

20/28

Emergency patients with ARF

2 h

50 L/min

>25

Unknown

 COT group

52

74.5 ± 14.0

24/28

2 h

 

Frat 2015

 HFNC group

106

61 ± 16

75/31

ICU patients with hypoxemic ARF

At least 48 h

50 L/min

>25

≤300

 COT group

94

59 ± 17

63/31

At least 48 h

 

Lemiale 2015

 HFNC group

52

59.3(43-70)*

38/14

Immunocompromised ICU patients with hypoxemic ARF

2 h

40-50 L/min

>30

Unknown

 COT group

48

64.5(53.25-72)*

32/16

2 h

 

Jones 2016

 HFNC group

165

74.6 ± 15.6

73/94

Emergency patients with ARF

24 h

40 L/min

≥22

Unknown

 COT group

138

72.2 ± 16.8

71/67

24 h

 
  1. Plus–minus values are means ± SD; * values are median (25th–75th percentile); M male, F female. ARF acute respiratory failure, HFNC high flow nasal cannula, COT conventional oxygen therapy, L/min liter per minute, RRs respiratory rates,P/F PaO2/FiO2