Table 1.
Baseline characteristics of the total study population, results are expressed as means (standard deviation) where nothing else is stated.
| Total Study Population | |
|---|---|
| Sex (%female) | 60.6 |
| Age (years) | 67.2 (7.1) |
| MRC-score | 4.7 (0.3) |
| FEV1, % | 28.6 (8.3) |
| BMI (kg/m2) | 29.0 (5.8) |
| Smoking status, present/former/never (%) | 33/67/0 |
| Time between initiation of long-term oxygen therapy and respiratory support (months) | 31 (12.7) |
| Number of hospitalizations twelve months before initiation of first respiratory support | 2.1 (1.6) |
| Number of hospitalizations twelve months after initiation of first respiratory support | 1.6 (0.4) |
| PaO2 at baseline (kPa) | 7.4 (0.82) |
| PaCO2 at baseline (kPa) | 7.9 (1.42) |
| HCO3 at baseline (mmol/L) | 32.5 (5.0) |
MRC = Medical Research Council; FEV1%: Forced expiratory volume in the first second in present of expected value (Global Lung Function Initiative); BMI = Body mass index; kPa = kilopascal; HCO3 = Standard Bicarbonate.