Specific causes of insomnia as a proportion of those with a sleep problem, n = 388
| Condition | Proportion of those with specific condition compared with those with a reported sleep problem, n (%) | 95% CI |
|---|---|---|
| Depression | 195 (50) | 45 to 55 |
| Anxiety | 185 (48) | 43 to 53 |
| Obstructive sleep apnoea | 34 (9) | 6 to 12 |
| Delayed sleep phase disordera | 7 (2) | 1 to 4 |
| Sleep walking | 5 (1) | 0 to 3 |
| Bruxism | 11 (3) | 2 to 5 |
| Restless legs | 86 (22) | 18 to 27 |
| General health problem | 165 (43) | 38 to 47 |
| Alcohol problem | 31 (8) | 6 to 11 |
| Other substance problem | 17 (4) | 2 to 7 |
| Primary insomniaa | 45 (12) | 9 to 15 |
↵a Primary insomnia and delayed sleep phase disorder are mutually exclusive. All other conditions are not.