Table 4 Odds Ratios associated with vascular events (case-crossover study, conditional logistic regression model)

All events

209

Exposure to triptans

1.63 (1.22–2.19)

Covariates

 Exposure to opioids

2.08 (1.21–3.59)

 Exposure to antiplatelet drugs

3.38 (1.65–6.93)

 Number of days of hospitalisation

1.19 (1.02–1.38)

 Season

  Summer vs. spring

0.83 (0.52–1.32)

  Automn vs. spring

1.03 (0.64–1.66)

  Winter vs. spring

1.08 (0.69–1.69)

Cerebral events

75

2.14 (1.26–3.63)

Cardiac events

89

1.41 (0.91–2.20)