Table 4.
Polysomnography
| ESRD | Control | p value | |
|---|---|---|---|
| Total recording time, h | 7.5 ± 0.9 | 7.8 ± 0.7 | 0.005 |
| Total sleep time (TST), h | 4.9 ± 1.6 | 5.6 ± 1.2 | 0.001 |
| Sleep efficiency, % | 71.4 ± 20.4 | 77.6 ± 15.3 | 0.015 |
| Sleep onset latency, min | 17.1 ± 25.8 | 20.6 ± 26.8 | NS |
| Wake after sleep onset, min | 98.5 ± 70.6 | 79.6 ± 58.3 | 0.03 |
| Stage 1, %TST | 17.1 ± 18.1 | 14.4 ± 12.5 | NS |
| Stage 2, %TST | 52.2 ± 15.8 | 56.8 ± 13.1 | 0.015 |
| Slow wave, %TST | 15.0 ± 10.7 | 13.6 ± 10.7 | NS |
| REM, %TST | 15.9 ± 8.8 | 15.2 ± 7.3 | NS |
| AHI | 44.2 ± 27.7 | 44.2 ± 27.6 | NS |
| Mean SpO2, % | 94.0 ± 2.6 | 93.7 ± 2.9 | NS |
| SpO2 < 90%, %TST | 8.9 ± 15.8 | 10.1 ± 20.0 | NS |
| PLM, /h | 25.2 ± 35.3 | 11.5 ± 21.5 | 0.002 |
| PLM arousals, /h | 8.0 ± 15.1 | 3.0 ± 8.2 | 0.006 |
| Respiratory arousals, /h | 39.6 ± 28.5 | 40.5 ± 27.2 | NS |
| Spontaneous arousals, /h | 6.2 ± 6.1 | 4.8 ± 4.2 | NS |
| Total arousals, /h | 53.8 ± 29.8 | 48.3 ± 25.8 | NS |
| Awakenings, /h | 8.6 ± 8.6 | 6.6 ± 6.1 | NS |
AHI = apnea-hypopnea index; ESRD = end-stage renal disease; PLM = periodic limb movements; SpO2 = oxyhemoglobin saturation; TST = total sleep time. Data are mean ± standard deviation.