Table 4 Odds of being in a higher category of monthly headache frequency, categorized as < 1 day, 1-7 days, 8-14 days, >14 days, among those reporting headache
From: Prevalence and predictors of headache in patients referred to polysomnography
n | Odds ratio | 95% confidence interval | p | |
|---|---|---|---|---|
Population | ||||
General population controls | 183 | 1 | ||
Patients: normal sleep study | 191 | 3.42 | (2.33-5.04) | <0.001 |
Patients: obstructive sleep apnea | 201 | 3.29 | (2.21-4.88) | <0.001 |
Patients: sleep study without assessment of AHI | 254 | 3.00 | (2.09-4.31) | <0.001 |
Age, increase of 1 year | 829 | 1.00 | (0.99-1.01) | 0.65 |
Gender | ||||
Male | 474 | 1 | ||
Female | 355 | 1.59 | (1.22-2.07) | 0.001 |
Education | ||||
0-9 years | 373 | 1 | ||
10-12 years | 153 | 0.60 | (0.42-0.85) | 0.005 |
>12 years | 303 | 0.62 | (0.47-0.83) | 0.001 |