Prevalence of sleep disorders in 1986 men aged 55–69 years in the Caerphilly cohort. (Men who had had a stroke or a myocardial infarct omitted)
| Symptom | Numbers* of men without the symptom, or the symptom only occasionally | Numbers* of men (%) with the symptom | |
|---|---|---|---|
| *Numbers for the different symptoms differ slightly because some men did not answer all the questions. †Daytime sleepiness is shown separately as it is a consequence of any of the above. | |||
| Insomnia: difficulty in getting to sleep and waking repeatedly once or twice a week, or more often. | 1654 | 219 (12) | |
| Restlesslegs: experiencing “restless legs or bothersome twitches” once or twice a week or more. | 1444 | 427 (23) | |
| Snoring: having been told, and being aware oneself of snoring on a few nights per month or more | 1190 | 665 (36) | |
| Sleep apnoea: having been told of gasping, choking or snorting on one night each week or more, and/or stopping breathing or breathing abnormally a few nights each month or more; and/or waking suddenly with a feeling of gasping or choking on a few nights each month or more | 1499 | 352 (19) | |
| Daytime sleepiness†: feeling today a little foggy, or slowed down, or loosing the struggle; and/or, at least once a week not feeling rested and/or feeling excessive sleepiness and/or a need for coffee or other stimulant | 1287 | 587 (31) | |