Table 1.
Objective sleep parameters in patients with IH and PSY obtained on the MSLT and the second night in the sleep laboratory.
| IH | PSY | P Value | |
|---|---|---|---|
| Number | 15 | 52 | |
| Age (y) | 41.4 ± 10.6 | 36.6 ± 11.5 | .15a |
| Female/male | 9/6 | 38/14 | .35b |
| TST, min | 686.9 ± 64.8.0 | 569.9 ± 119.7 | < .001c |
| Sleep latency, min | 13.5 ± 9.0 | 14.8 ± 10.4 | .6a |
| REM sleep latency, min | 109.5 ± 33.1 | 113.8 ± 26.2 | .7a |
| Sleep efficiency, % | 92.9 ± 3.2 | 87.6 ± 6.4 | .007c |
| NREM sleep 1, % SPT | 5.7 ± 4.6 | 5.0 ± 4.3 | .6a |
| NREM sleep 2, % SPT | 49.4 ± 6.7 | 45.1 ± 6.9 | .04a |
| NREM sleep 3, % SPT | 19.3 ± 5.4 | 16.1 ± 5.1 | .06a |
| REM sleep, % SPT | 20.7 ± 5.0 | 19.9 ± 5.7 | .6 |
| WASO, % SPT | 8.8 ± 7.2 | 12.7 ± 9.3 | .1a |
| AHI, events/h | 1.2 ± 1.8 | 1.8 ± 0.4 | .2c |
| PLMI | 2.8 ± 2.0 | 3.9 ± 1.1 | .06c |
| MSLT mean latency, min | 4.9 ± 2.0 | 9.1 ± 4.5 | < .001c |
| MSLT, no SOREMPs (total number) | 6 | 4 |
aWelch’s t test. bFisher exact test. cMann-Whitney U test. AHI = apnea-hypopnea index, IH = idiopathic hypersomnia, MSLT = Multiple Sleep Latency Test, NREM = nonrapid eye movement, PLMI = periodic limb movement in sleep, PSY = hypersomnia associated with psychiatric disorder, REM = rapid eye movement, SOREMPs = sleep-onset REM periods, SPT = sleep period time, WASO = wake after sleep onset.