Table 3.

Stepwise logistic regression model presenting the probability of migraine prevalence in adults.

Effect	Nagelkerke R2 = 0.07
	Coefficient	Standard error	Wald value	OR	95% CI for OR	p
Maternal smoking (MSDP): yes1	0.618	0.295	4.385	3.42	1.54–7.61	0.036
Maternal smoking (MSDP): do not know1	−0.007	0.301	0.001	1.83	0.80–4.17	0.981
Traumatic event: yes1	0.492	0.211	5.407	2.27	1.24–4.13	0.020
Traumatic event: do not know1	−0.164	0.214	0.590	1.18	0.64–2.17	0.442

¹vs no.

OR, odds ratio; p, probability; Wald test was used to check regression variables’ relevance.