Table 1.
Subject characteristics and measured variables for elderly individuals without obstructive sleep apnoea (OSA)
| Subject | Sex | BMI (kg m−2) | Age (years) | PCO2(mmHg)a | Ventilation(l min−1)a | CPAP (cmH2O) | Loop gain (dimensionless) |
|---|---|---|---|---|---|---|---|
| 1 | F | 27 | 65 | 43 | 5.0 | 5 | 0.15 |
| 2 | F | 28 | 71 | 40 | 5.1 | 8 | 0.23 |
| 3 | M | 28 | 73 | 35 | 7.8 | 9 | 0.23 |
| 4 | M | 22 | 72 | 39 | 5.2 | 6 | 0.26 |
| 5 | F | 23 | 65 | 38 | 4.2 | 4 | ≤0.17 |
| 6 | F | 27 | 72 | 38 | 5.1 | 4 | ≤0.26 |
| 7 | M | 24 | 75 | 39 | 6.2 | 4 | ≤0.26 |
| 8 | F | 26 | 78 | 37 | 5.0 | 4 | ≤0.27 |
| 9 | F | 20 | 60 | 47 | 5.9 | 6 | ≤0.28 |
| 10 | F | 26 | 75 | 46 | 3.9 | 5 | ≤0.29 |
| 11 | F | 28 | 71 | 42 | 5.7 | 4 | ≤0.44 |
| Mean | 3M/8F | 25 | 71 | 40 | 5.4 | 5 | ≤0.25 |
| s.d. | — | 3 | 5 | 4 | 1.0 | 2 | 0.08 |
a
Baseline levels during sleep on continuous positive airway pressure (CPAP).