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Table 2 Pulse oximetry monitoring results in ex-/non-smokers (n = 39)

From: Ambulatory pulse oximetry monitoring in Japanese COPD outpatients not receiving oxygen therapy

  Daytime Nighttime
Monitoring duration (hours)   
  Mean ± SD 14.5 ± 3.7 8.5 ± 3.0
Proportion of SpO2 values < 90% (%)   
  Mean ± SD 3.0 ± 5.5 7.4 ± 16.1
  Median (range) 1.1 (0.0–28.1) 1.3 (0.0–87.3)
Mean SpO2 (%)   
  Mean ± SD 94.7 ± 1.2 93.7 ± 1.8
  Median (range) 94.9 (90.7–97.4) 93.9 (88.8–96.8)
Heart rate (beats/min)   
  Mean ± SD 76.9 ± 10.6 69.0 ± 9.0
  Median (range) 75.0 (49.4–101.0) 68.2 (49.4–87.1)
  1. SD, Standard deviation; SpO2, Oxygen saturation by pulse oximetry.