Table 2.
Comparison of Polysomnographic Results Among Male and Female Study Participants with Obstructive Sleep Apnea
| PSG Variables | Female | Male | All Participants | P-value |
|---|---|---|---|---|
| Total | 143 | 154 | 297 | |
| Sleep Latency (min) | 20 (7.2–40.5) | 16.6 (5.5–41.6) | 18.5 (6.2–41.3) | 0.386 |
| REM Onset (min) | 107 (74–183.5) | 121 (75–188) | 115.8 (74.5–187.25) | 0.676 |
| Wake After Sleep Onset (min) | 74 (45.1–116.2) | 91.4 (44.5–173) | 81.25 (44.8–148.05) | 0.123 |
| Sleep Efficiency (%) | 77.7 (68.2–86.0) | 74.4 (60.4–85.9) | 76.5 (64.3–86.0) | 0.125 |
| Total Sleep Time (min) | 388.5 (338–451.5) | 379.5 (296.5–437) | 385.0 (319.8–439.0) | 0.181 |
| *N1 Sleep Percentage | 9.6 (6.1–17.1) | 18.2 (11.7 29.4) | 13.4 (8–23.7) | 0.001 |
| N2 Sleep Percentage | 53.9 (43.9–60.4) | 51.5 (39.3–61.6) | 52.6 (41.4–60.9) | 0.570 |
| *N3 Sleep Percentage | 11.9 (4.3–20.6) | 4.4 (0.6–11.3) | 8.3 (1.6–15.9) | 0.000 |
| Stage REM Percentage | 17.7 (10.9–22.3) | 17 (11.2–22.9) | 17.3 (11.2–22.3) | 0.799 |
| *Respiratory Arousal Index (/h) | 9.9 (4.0–18.9) | 18 (6.9–38.7) | 12.5 (5.6–27.1) | 0.000 |
| Limb Related Arousal Index (/h) | 4.4 (2.5–8.3) | 3.7 (1.9–7.6) | 4.1 (2.1–7.8) | 0.269 |
| *Spontaneous Arousal Index (/h) | 3.4 (1.7–6.3) | 2.4 (0.9–5.3) | 3.1 (1.2–5.8) | 0.021 |
| *Total Arousal Index (/h) | 23.8 (15.8–34.9) | 28.4 (18.3–48) | 25.8 (16.8–41) | 0.005 |
| *Total AHI (/h) | 21.9 (12.6–45.5) | 44.3 (20.3–67.2) | 32 (14.7–60.7) | 0.001 |
| *NREM AHI (/h) | 17.2 (7.4–43.6) | 46.4 (18.5–67.9) | 27.2 (10.8–60.6) | 0.001 |
| REM AHI (/h) | 41.55 (22.5–73.4) | 42.9 (22.5–68.9) | 41.9 (22.5–71.6) | 0.689 |
| Avg SpO2: Wake | 95 (93–96) | 95 (93–96) | 95 (93–96) | 0.436 |
| Avg SpO2: NREM | 93 (91–95) | 93 (91–95) | 93 (91–95) | 0.346 |
| Avg SpO2: REM | 93 (89–95) | 93 (88–95) | 93 (89 −95) | 0.928 |
| Minimum SpO2 During Sleep (%) | 80 (70–85) | 76.5 (65–85) | 78 (68–85) | 0.133 |
Notes: Data are presented as median (interquartile range). *Statistically significant.
Abbreviations: AHI, apnea hypopnea index; REM, rapid eye movement; NRE, non rapid eye movement; N1, N2, N3, non-rapid eye movement sleep stage; Avg SpO2, average oxygen saturation; /h, per hour.