Table 5.

Association of CD with prior headache-related visit (conditional logistic regression)

Stratum	Number of events	Prevalence of prior headache (%)	Adjusted* OR (95% CI)
Overall	458	1.6	1.65 (1.48–1.83)
Gender
Male	137	1.2	1.77 (1.46–2.15)
Female	321	1.8	1.60 (1.42–1.82)
Age at Study Entry (years)
0–19	82	0.7	2.19 (1.69–2.84)
20–39	101	1.9	1.50 (1.21–1.87)
40–59	145	2.2	1.61 (1.34–1.94)
60–79	119	2.5	1.69 (1.38–2.08)
≥80	11	1.7	0.95 (0.50–1.82)

^*Compared to matched controls, adjusted for education level