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. 2022 Mar 9;9:842224. doi: 10.3389/fmed.2022.842224

Table 2.

Polysomnography parameters results.

Total (n = 32) Group A (n = 20) Group B (n = 12) P value between groups
LP OP P value LP MFP P value
AHI, events/h 34.9 ± 22.6 39.0 ± 27.7 42.2 ± 32.5 0.279 28.0 ± 5.9 26.6 ± 9.0 0.301 0.173
Non-REM, % 34.8 ± 24.3 40.2 ± 29.1 41.5 ± 33.8 0.514 26.0 ± 8.4 27.0 ± 10.6 0.340 0.498
REM, % 40.8 ± 22.5 38.3 ± 24.6 44.3 ± 26.8 0.247 44.9 ± 18.9 35.1 ± 15.4 0.032 0.946
Body position distribution desaturation at
 Left, % 31.1 ± 34.2 28.0 ± 11.4 16.7 ± 8.6 0.001 68.9 ± 27.4 46.2 ± 29.3 0.013 <0.001
 Right, % 51.9 ± 43.8 47.2 ± 54.3 14.3 ± 5.1 0.001 59.8 ± 14.3 59.5 ± 21.3 0.875 0.934
 Up, % 51.3 ± 68.4 67.1 ± 83.2 83.4 ± 88.1 0.274 25.0 ± 5.5 6.5 ± 3.1 0.005 0.145
Averages values in HR during awakening, bpm 77.1 ± 10.2 75.2 ± 12.0 78.5 ± 22.9 0.247 80.4 ± 4.0 84.6 ± 5.2 0.003 0.799
Averages values in HR non-REM stage, bpm 66.6 ± 9.3 68.0 ± 8.3 69.4 ± 7.7 0.305 64.3 ± 10.8 72.2 ± 4.7 0.003 0.051
Averages values in HR REM stage, bpm 72.1 ± 10.2 69.8 ± 11.7 72.1 ± 16.3 0.191 75.8 ± 6.0 80.3 ± 9.1 0.003 0.459
Desaturation index during sleep 34.8 ± 25.0 40.3 ± 29.9 43.7 ± 35.3 0.296 25.6 ± 8.9 23.3 ± 8.6 0.017 0.140
Desaturation duration, min 14.4 ± 9.9 16.0 ± 12.5 16.3 ± 12.9 0.747 11.8 ± 3.5 10.9 ± 3.8 0.054 0.253
Averages values in SaO2 per respiratory event, % 90.0 ± 3.8 89.6 ± 4.7 88.7 ± 4.9 0.038 90.8 ± 1.2 90.7 ± 1.1 0.011 0.143
Minimum SaO2 per respiratory event, % 83.0 ± 7.2 83.2 ± 8.7 81.6 ± 8.8 0.192 82.7 ± 3.7 84.8 ± 2.9 0.006 0.159
Awakening index, n/h 37.5 ± 24.6 41.5 ± 30.1 53.9 ± 29.8 <0.001 31.0 ± 7.9 30.0 ± 10.0 0.301 0.031
Snoring duration, min 36.8 ± 21.2 33.6 ± 26.2 30.2 ± 17.2 0.911 42.2 ± 5.0 37.5 ± 3.7 0.002 0.356
Snoring events 100.3 ± 48.8 96.8 ± 60.6 94.5 ± 55.6 0.852 106.0 ± 17.8 55.8 ± 23.7 0.002 0.058

Data are expressed as mean ± standard deviation or percentages changes. AHI, apnea-hypopnea index; HR, heart rate; Left: Desaturation during sleep in left body position; LP, laboratory pillow; MFP, memory foam pillow; OP, own-pillow; REM, rapid eye movement during sleep; Right: Desaturation during sleep in right body position; Up: Desaturation during sleep in supine body position.