Table 2.

Multivariable logistic regression analysis of headache characteristics associated with avoid pregnancy group

	Odds ratio	95% confidence interval	p values
Age (years)	1.16	1.05–1.29	0.004*
Duration of headache (h)	0.91	0.85–0.98	0.016*
MHD (days/month)	1.08	1.01–1.16	0.031*
Unilateral pain	0.67	0.26–1.78	0.428
Pulsating pain	0.37	0.12–1.14	0.084
Moderate or severe pain	0.27	0.04–2.02	0.201
Aggravation by routine physical activity	4.01	0.89–18.01	0.070
Nausea or vomiting	6.11	1.46–25.60	0.013*
Photophobia	1.72	0.42–7.01	0.448
Phonophobia	6.40	1.71–23.99	0.006*
Osmophobia	0.22	0.03–1.58	0.131

This table presents the results of a multivariable logistic regression analysis examining which headache characteristics were associated with the avoid pregnancy group (as 1) or no impact group (as 0). All explanatory variables were entered simultaneously using the forced-entry method. Odds ratios greater than 1 indicate a higher likelihood of avoiding pregnancy. P-values less than 0.05 were considered statistically significant and are marked with an asterisk (*). The logistic regression model demonstrated acceptable explanatory power, with a Nagelkerke’s R² of 0.373. The overall model was statistically significant (χ² = 40.5, p < 0.001). MHD; monthly headache days