Table 3 Sleep architecture and descriptive information for the testing sample
From: Using heart rate profiles during sleep as a biomarker of depression
Variable | Control [x̅ ± SD]b | MDD [x̅ ± SD]b | U/χ2 | p |
|---|---|---|---|---|
n | 87 | 87 | – | – |
Sex Distribution (%female) | 55.2 | 58.6 | .211 | .646 |
Age (years) | 43.3 ± 11.3 | 43.6 ± 10.5 | 3744.0 | .903 |
AHI | 1.7 ± 2.8 | 3.3 ± 5.0 | 2769.5 | .002 |
BMI (kg/m2) | – | 29.6 ± 6.8 | – | – |
BDI II Score | – | 24.6 ± 9.0 | – | – |
Recording Time Before Sleep (min) | 21.6 ± 15.0 | 40.2 ± 28.3 | 1882.5 | .000 |
Recording Time After Sleep (min) | 9.5 ± 28.9 | 4.6 ± 8.2 | 3398.5 | .295 |
Total Recording Duration (min) | 468.4 ± 35.6 | 474.2 ± 55.4 | 3550.5 | .563 |
Total Sleep Time [TST (min)] | 386.2 ± 43.8 | 355.6 ± 76.4 | 2891.0 | .007 |
Sleep Efficiency (%) | 87.7 ± 7.3 | 82.9 ± 14.3 | 3305.0 | .149 |
Sleep Onset Latency (min) | 13.6 ± 13.0 | 20.3 ± 18.7 | 2782.5 | .003 |
REM Latency (min)a | 98.6 ± 48.3 | 190.9 ± 106.6 | 1363.5 | <.001 |
WASO (min) | 55.1 ± 32.4 | 72.9 ± 62.2 | 3451.5 | .316 |
N1 (min) | 32.8 ± 18.8 | 66.4 ± 37.4 | 1617.5 | <.001 |
N2 (min) | 223.1 ± 47.9 | 207.3 ± 63.4 | 3151.0 | .057 |
N3 (min) | 54.7 ± 39.1 | 34.8 ± 33.7 | 2595.0 | <.001 |
REM (min) | 75.7 ± 25.5 | 47.1 ± 32.9 | 1788.0 | <.001 |
N1 (% of TST) | 8.7 ± 5.3 | 19.5 ± 11.5 | 1441.0 | <.001 |
N2 (% of TST) | 57.7 ± 10.5 | 58.0 ± 11.5 | 3760.0 | .941 |
N3 (% of TST) | 14.2 ± 10.1 | 9.7 ± 8.6 | 2758.0 | .002 |
REM (% of TST) | 19.4 ± 5.7 | 12.9 ± 9.0 | 1780.0 | <.001 |