Table 2.
Pairwise comparison of PSG and EMFIT QS sleep measures.
| Variable | PSG | EMFIT QS | t/w | P | ||
|---|---|---|---|---|---|---|
| Mean ± SD | 95% CI | Mean ± SD | 95% CI | |||
| Avg HR | 64.3 ± 13.9 | 59.5, 69.2 | 62.8 ± 7.3 | 60.3, 65.3 | 209 | .45 |
| Min HR | 50.3 ± 12.4 | 46.03, 54.6 | 45.6 ± 3.8 | 44.2, 46.9 | 147 | 0.08 |
| Max HR | 79.3 ± 21.2 | 72, 86.7 | 102.5 ± 17.4 | 96.6, 108.5 | 40.5 | 7.8e-05* |
| TST | 303 ± 95.1 | 270.6, 335.5 | 480.5 ± 97.9 | 447.1, 513.9 | 34 | 1.1e-05* |
| SOL | 33.6 ± 43.8 | 18.7, 48.5 | 28 ± 11.9 | 23.9, 32 | 201 | .16 |
| WASO | 102.2 ± 66.1 | 79.6, 124.7 | 57.4 ± 19.2 | 50.9, 64 | 3.7 | .0007* |
| Light sleep | 184.9 ± 74.8 | 159.3, 210.4 | 279.1 ± 59.5 | 258.8, 299.1 | −5.98 | 1.1e-06* |
| Deep sleep | 77.3 ± 44 | 62.3, 92.4 | 85.6 ± 27.4 | 76.3, 95 | 197.5 | .13 |
| REM | 44.5 ± 26.5 | 28.2, 60.95 | 106.5 ± 32.1 | 86.6, 126.4 | −10.5 | 6.2e-12* |
All times are in minutes. *Represents statistical significance. Avg = average, CI = confidence interval, HR = heart rate, Max = maximum, Min = minimum, QS = quantified sleep, REM = rapid eye movement, SD = standard deviation, SOL = sleep onset latency, t = paired t-test, TST = total sleep time, w = Wilcoxon signed-rank, WASO = wake after sleep onset.