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Table 4 Specific data of COPD and OHS patient groups on 1.1.2018

From: The prevalence of non-invasive ventilation and long-term oxygen treatment in Helsinki University Hospital area, Finland

  COPD patients with NIV*
(N = 102)
COPD patients with LTOT
(N = 169)
p value
Age at 1.1.2018 (years ± SD) 71.2 ± 7.9 75.7 ± 7.7 p < 0.001
ACCI (mean ± SD) 3.8 ± 2.4 5.1 ± 2.9 p < 0.001
Mortality (%) during 1.1.2018–1.1.2021 47.5 69.8 p < 0.001
Concomitant sleep apnea N (%) 32 (31.4%) 19 (11.2%) p < 0.001
BMI (mean ± SD) kg/m2 30.5 ± 8.3 26.8 ± 9.6 p = 0.002
AHI (mean ± SD)** 28.7 ± 23.0 20.3 ± 17.3 p = 0.306
  1. COPD, chronic obstructive pulmonary disease; NIV, non-invasive ventilation; LTOT, long-term oxygen treatment; OHS, obesity hypoventilation syndrome; ACCI, age-adjusted Charlson co-morbity index; BMI, body mass index; AHI, apnea-hypopnea index
  2. *Includes patients who underwent LTOT with their NIV
  3. **AHI counted for patients with concomitant sleep apnea. The information was known for 31.4% of the NIV treated and 11.2% of the LTOT treated COPD patients