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Table 2 The different values of pulse oximetry value during the intubation procedure

From: Comparison of hypoxemia, intubation procedure, and complications for non-invasive ventilation against high-flow nasal cannula oxygen therapy for patients with acute hypoxemic respiratory failure: a non-randomized retrospective analysis for effectiveness and safety (NIVaHIC-aHRF)

Values of pulse oximetry

Cohorts

Comparisons between cohorts

NIV

HCO

Procedure for oxygenation and ventilation

Non-invasive ventilation

High-flow nasal cannula oxygen

Patients included in the analysis

154

161

p-value

Hypoxemia

 At the beginning of preoxygenation (mean ± standard deviation)

95 ± 4%

94 ± 5%

0.052

 The lowest value during the intubation procedure (mean ± standard deviation)

78 ± 4%

77 ± 6%

0.084

 Numbers of patients with severe hypoxiaa (frequency (percentages))

35 (23)

45 (28)

0.303

 At the end of preoxygenation (mean ± standard deviation)

97 ± 5%

96 ± 5%

0.077

  1. For constant variables the Fischer exact test and for continuous and ordinal variables the Mann-Whitney U-test was performed for statistical analysis
  2. aA decrease in pulse oximetry reading below 80% for at least 5 s during intubation procedure
  3. A p-value of less than 0.05 was considered significant