| Baseline | Follow-up | Baseline | Follow-up | Time-point | Intervention | Intervention × time-point | Sleep stage | Intervention × sleep stage |
Subjects | 194 | 181 | | | |
Respiratory rate cycles per min | | | | | | | | | |
N2 | 17.24±2.75 | 18.60±2.46 | 17.18±2.58 | 17.52±2.68 | <0.001 | 0.01 | 0.02 | <0.001 | 0.4+ |
N3 | 18.08±2.62 | 19.29±2.56 | 18.0±2.71 | 18.53±3.03 | | | | | |
REM | 19.08±2.80 | 20.23±2.66 | 19.24±2.81 | 19.42±3.22 | | | | | |
RSA¶ | | | | | | | | | |
N2 | 1.93±0.32 | 1.86±0.2 | 1.95±0.27 | 1.95±0.27 | 0.4+ | 0.06 | 0.05 | <0.001 | 0.5+ |
N3 | 1.90±0.35 | 1.81±0.29 | 1.90±0.30 | 1.91±0.28 | | | | | |
REM | 1.67±0.34 | 1.59±0.32 | 1.66±0.32 | 1.67±0.31 | | | | | |
Heart rate beats per min | | | | | | | | | |
N2 | 80.8±9.9 | 79.7±9.3 | 80.6±9.3 | 79.4±8.4 | 0.06+ | 0.5+ | 0.8+ | <0.001 | 0.4+ |
N3 | 83.7±10.4 | 82.7±9.9 | 83.8±9.8 | 82.6±8.8 | | | | | |
REM | 85.2±9.0 | 83.6±8.0 | 84.9±8.9 | 83.5±8.5 | | | | | |