Skip to main content

Free Content Sleep and daytime sleepiness in retinitis pigmentosa patients

Download Article:

You have access to the full text article on a website external to Ingenta Connect.

Please click here to view this article on Wiley Online Library.

You may be required to register and activate access on Wiley Online Library before you can obtain the full text. If you have any queries please visit Wiley Online Library

Objective We examined sleep, daytime sleepiness and the ability to stay awake during the day in patients affected with retinitis pigmentosa (RP), to further delineate the role of photoreceptors in the circadian cycle.

Methods Twelve individuals diagnosed with RP (40 ± 8 years) And 12 normally sighted healthy individuals (39 ± 7 years) matched for age, body mass index (BMI) and sex were selected for the study. Participants had their sleep recorded on two consecutive nights and were monitored on the two following days. On the first day, their ability to stay awake and on the second, their sleep propensity were assessed using the Maintenance of Wakefulness Test (MWT) and the Multiple Sleep Latency Test (MSLT), respectively. Self-report measures were obtained using the Pittsburgh Sleep Quality Index (PSQI), the Epworth Sleepiness Scale (ESS), and the Toronto Hospital Alertness Test (THAT).

Results Subjective daytime sleepiness (ESS: 9 ± 5 vs. 6 ± 4, P=0.053) and objectively measured sleep propensity (MSLT: 10 ± 5 vs. 17 ± 3 min, P < 0.000) were significantly higher in RP patients than controls, whilst their alertness (THAT: 29 ± 9 vs. 38 ± 7, P=0.016) and ability to stay awake (MWT: 21 ± 9 vs. 29 ± 2 min, P=0.006) were significantly reduced. Retinitis pigmentosa participants had more disturbed nighttime sleep, with significantly more awakenings (arousal index: 14 ± 8 vs. 8 ± 6 h, P=0.039), and tended to have less rapid eye movement (REM) sleep (19 ± 5 vs. 22 ± 3%, P=0.094).

Conclusion Patients with RP have increased daytime sleepiness, reduced alertness and more disturbed nighttime sleep of poorer quality than their normally sighted counterparts, suggesting an influence of photoreceptor degeneration on the circadian cycle.
No References
No Citations
No Supplementary Data
No Data/Media
No Metrics

Keywords: circadian rhythm; light; melatonin; photoreceptors; retinitis pigmentosa; sleep disturbances

Document Type: Research Article

Publication date: 2001-12-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more