Table 2 Patient characteristics
From: Consequences of chronic kidney disease in chronic obstructive pulmonary disease
N | All | No CKD | CKD | p value | |
|---|---|---|---|---|---|
Age (years) | 2274 | 65.0 ± 8.4 | 64.5 ± 8.3 | 72.2 ± 6.6 | < 0.0001 |
Male | 2274 | 1378 (60.6%) | 1280 (60.6%) | 98 (60.9%) | 0.9471 |
BMI (kg/m2) | 2272 | 27.2 ± 5.2 | 27.00 ± 5.2 | 28.7 ± 5.3 | < 0.0001 |
Smoking history (PY) a | 2192 | 40.0 [16.5–63.8] | 39.0 [16.5–63.0] | 51.3 ± 43.3 | 0.0793 |
Lung function | |||||
FVC (L) | 2256 | 3.0 ± 1.0 | 3.0 ± 1.0 | 2.9 ± 0.9 | 0.1660 |
FVC (%pred) | 2256 | 78.6 ± 18.9 | 78.7 ± 18.9 | 77.4 ± 18.4 | 0.3875 |
FEV1 (L) a | 2260 | 16 [1.1–2.1] | 1.6 [1.2–2.1] | 1.5 [1.1–2.0] | 0.3162 |
FEV1 (%pred) | 2260 | 57.0 ± 21.0 | 57.0 ± 20.9 | 56.6 ± 22.4 | 0.7416 |
ITGV (L) | 2205 | 4.7 ± 1.3 | 4.7 ± 1.3 | 4.7 ± 1.3 | 0.4425 |
ITGV (%pred) | 2205 | 143.5 ± 37.7 | 143.2 ± 37.5 | 147.1 ± 39.6 | 0.2098 |
RV (L) | 2194 | 3.8 ± 1.23 | 3.8 ± 1.2 | 3.9 ± 1.3 | 0.1667 |
RV (%pred) | 2134 | 167.42 ± 58.6 | 168.2 ± 58.8 | 156.1 ± 54.5 | 0.0143 |
TLC (L) | 2189 | 7.1 ± 1.5 | 7.1 ± 1.5 | 7.1 ± 1.4 | 0.7341 |
TLC (%pred) | 2189 | 115.5 ± 20.3 | 115.3 ± 20.2 | 117.9 ± 21.3 | 0.1474 |
TLCO (%) | 2146 | 55.7 ± 21.8 | 55.9 ± 21.7 | 55.4 ± 23.1 | 0.7861 |
GOLD Classification | |||||
Stage 0 | 2260 | 363 (16.1) | 333 (15.8) | 30 (18.6) | 0.0073 |
Stage I | 2260 | 182 (8.1) | 166 (7.9) | 16 (9.9) | |
Stage II | 2260 | 831 (36.7) | 760 (36.2) | 71 (44.10) | |
Stage III | 2260 | 706 (31.2) | 666 (31.8) | 40 (24.8) | |
Stage IV | 2260 | 178 (7.9) | 174 (8.3) | 4 (2.5) | |
Blood gas analysis | |||||
pH value | 2213 | 7.4 ± 0.1 | 7.4 ± 0.1 | 7.4 ± 0.0 | 0.3847 |
PaO2 (mmHg) | 2212 | 67.4 ± 9.2 | 67.3 ± 9.1 | 68.5 ± 10.8 | 0.1792 |
PacO2 (mmHg) | 2212 | 37.7 ± 4.9 | 37.7 ± 4.9 | 37.6 ± 4.6 | 0.7490 |
HCO3 (mmol/L) | 2211 | 24.3 ± 2.9 | 24.2 ± 2.9 | 24.4 ± 2.8 | 0.6371 |