Table 3.: Comparison of Polysomnographic Findings Between Men and Women

Parameter Women (n= 20) Men (n= 15) p Value
AHI <5 n(%) 0 1 (7) 0.24
AHI ≥5 n(%) 20 (100) 14 (93) 0.25
AHI ≥5 y <15, n(%) 3 (15) 4 (27) 0.39
AHI ≥15 y <30, n(%) 4 (20) 2 (13) 0.60
AHI ≥30, n(%) 13 (65) 8 (53) 0.48
Habitual snorer, n(%) 20 (100) 12 (80) 0.03
Candidate for CPAP, n(%) 19 (95) 12 (80) 0.16
Epworth score* 10 (6 – 18) 2 - 22 10 (7 – 12) 2 - 24 0.54
Sleep Efficiency (%)* 86 (79 – 91) 62 - 95 88 (84 – 92) 57 - 98 0.30
Latency to 1st stage (min)* 18 (11 – 25) 4 - 59 16 (12 – 19) 0 - 25 0.31
Latency to REM (min)* 89 (84 – 128) 52 - 339 76 (67 – 128) 50 - 249 0.30
Stage 1 (%)* 15 (12 – 17) 5 - 28 13 (11 – 25) 3 - 52 0.94
Stage 2 (%)* 54 (46 – 59) 37 - 71 48 (47 – 56) 39 - 58 0.32
Stage 3 (%)* 16 (10 – 19) 8 - 31 16 (13 – 23) 1 - 26 0.66
REM (%)* 15 (13 – 19) 9 - 22 15 (13 – 18) 9 - 27 0.84
Index of arousals* 30 (24 – 38) 8 - 82 30 (16 – 59) 8 - 70 0.86
Index of respiratory arousals * 16 (5 – 22) 0 - 63 11 (5 – 53) 0 - 67 0.52
AHI (events/hour)* 33.4 (29 – 54.5) 11 - 108 39.4 (12 – 76) 3.3 – 87.5 0.96
Daytime SpO2* 94 (92 – 95) 86 - 96 93 (92 – 95) 88 - 96 0.53
SpO2 while laying awake* 92 (89 – 94) 82 - 95 93 (90 – 94) 90 - 96 0.37
Average SpO2 during sleep* 90 (86 – 92) 62 - 95 90 (87 – 93) 70 - 95 0.89
REM SpO2* 89 (86 – 91) 56 - 95 89 (84 – 93) 63 - 95 0.83
NREM SpO2* 90 (86 – 92) 69 - 95 90 (88 – 93) 75 - 94 0.97

AHI: apnea-hypopnea index, CPAP: continuous positive airway pressure, REM: rapid eye-movement sleep, NREM: non-rapid eye-movement sleep, Sp2: percentage of saturation by pulse oxymetry.
* Mean (Interquartile interval) min. – max.