In the Funding statement, the grant number from the funder Fundamental Research Funds for the Central Universities is listed incorrectly. The correct grant number is: SWU118004.
The ISI score values in Table 1 are incorrect. The authors have provided a corrected version here.
Table 1. Participant characteristics and sleep measures.
| Young (n = 43) | Old (n = 37) | p-value | |
|---|---|---|---|
| Gender (female/male) | 21/22 | 20/17 | 0.64a |
| ESS (mean±SD) | 7.23±3.01 | 8.65±4.8 | 0.11b |
| ISI (mean±SD) | 10.5±2.13 | 9±1.53 | 0.0014b |
| KSQ sleep quality index (mean±SD) | 5.26±0.43 | 5.19±0.48 | 0.52b |
| KSQ snoring symtom index (mean±SD) | 5.88±0.32 | 5.65±0.54 | 0.02b |
aChi-square test
bTwo-tailed two sample t-test
Bold p-values indicates significant difference in sleep measures between young group and old group. SD, standard deviation; ESS, Epworth Sleepiness Scale; ISI, Insomnia Severity Index; KSQ, Karolinska Sleep Questionnaire.
Reference
- 1.Long Z, Cheng F, Lei X (2020) Age effect on gray matter volume changes after sleep restriction. PLoS ONE 15(2): e0228473 10.1371/journal.pone.0228473 [DOI] [PMC free article] [PubMed] [Google Scholar]