Table 3.

Odds ratios and confidence intervals of model's parameters.

Parameter	Coefficient	P-value	Odds ratio	Confidence interval [2.5%, 97.5%]
Headaches' frequency >15 days/month	1.56	4.97 10−15	4.76	[3.23, 7.07]
Triptans = true	0.41	0.047	1.51	[1.00, 2.26]
Opioids = true	0.54	0.0078	1.72	[1.15, 2.56]
Number of intakes = 3–4 per day	0.32	0.128	1.38	[0.91, 2.09]
Number of intakes >4 per day	1.19	0.023	3.27	[1.18, 9.33]
Maximal number of days of medicine intake = 2 days	0.56	0.20	1.75	[0.78, 4.35]
Maximal number of days of medicine intake >2 days	1.64	5.92 10−5	5.14	[2.43, 12.26]