From: Comorbidity of poor sleep and primary headaches among nursing staff in north China
Sleep | Headache frequency (episodes/month) | Headache intensity | ||||
---|---|---|---|---|---|---|
≤2 | >2 | OR (95%CI) | VAS ≤ 4 | VAS ≥ 4 | OR (95%CI) | |
1.48 (0.99–2.2) | 1.72 (1.14–2.57) | |||||
Normal sleepers (N%) | 91 (61.5 %) | 57 (38.5 %) | 98 (66.2 %) | 50 (33.8 %) | ||
Poor sleepers (N%) | 163 (51.9 %) | 151 (48.1 %) | 168 (53.3 %) | 147 (46.7 %) |