Subjects n | Wakefulness PCO2 mmHg | NREM sleep PCO2 mmHg | |||||
Rest | 200 mL·min−1 | 400 mL·min−1 | Rest | 200 mL·min−1 | 400 mL·min−1 | ||
Elderly | 10 | 39.2±2.8 | 43.5±3.6 | 47.0±4.1 | 41.2±3.9 | 45.4±3.6 | 51.1±3.8 |
Young | 10 | 41.2±2.1 | 45.3±2.0 | 47.7±1.3 | 44.0±3.2 | 47.8±3.6 | 51.9±3.7 |
p‐value | 0.09 | 0.17 | 0.64 | 0.09 | 0.14 | 0.69 |
Data are presented as mean±sd unless otherwise stated. kPa=mmHg×0.133. p‐Value given for unpaired t‐tests