Table 2 Distribution of baseline covariates in the long-term oxygen treatment group, the matched short-term, and the matched long-term references with the corresponding standardised differences (St-D) between the LTOT-group and the references. Note that some of the references are counted several times so that number of observation is 20 in each group (index to references = n to 1)
Treatment | Reference groups | ||||
|---|---|---|---|---|---|
Covariates at inclusion | LTOT | Short-term | St-D | Long-term | St-D |
Female, N (%) | 14 (70) | 15 (75) | 0.11 | 13 (65) | 0.15 |
Age, years, mean (sd) | 72.5 (6.8) | 70.9 (6.9) | 0.08 | 71.5 (3.2) | 0.06 |
Arterial hypertension, n (%) | 10 (60) | 11 (65) | 0.10 | 7 (44) | 0.33 |
Diabetes, n (%) | 1 (5) | 0 (0) | 0.32 | 3 (19) | 0.44 |
FEV1, Litres, mean (sd) | 0.93 (0.65) | 0.79 (0.37) | 0.09 | 1.06 (0.44) | 0.08 |
ISWT, m, mean (sd) | 109 (101) | n.a. | 116 (89) | 0.03 | |
CO2-tension, kPa, mean (sd) | 5.7 (0.88) | 5.9 (1.1) | 0.08 | 5.4 (1.1) | 0.11 |
CAT-score, mean (sd) | 23.7 (901) | 24.7 (4.1) | 0.05 | 21.4 (4.6) | 0.11 |
Leucocytes, 109/Litres, gm (gsd) | 7.8 (2.9) | 9.2 (4.2) | 0.15 | 6.5 (1.0) | 0.20 |
C-Reactive Protein, mg/L, gm (gsd) | 5.1 (4.4) | 5.9 (4.0) | 0.04 | 2.7 (3.5) | 0.17 |
Creatinine, µmol/Litres, gm (gsd) | 69.4 (1.5) | 75.3 (1.3) | 0.08 | 61.6 (1.2) | 0.13 |
hs-cTnT, ng/L, gm (gsd) | 16.5 (2.7) | 20.7 (4.9) | 0.06 | 14.0 (2.4) | 0.06 |