The effect of pre-pregnancy hair dye exposure on infant birth weight: a nested case-control study

Table 5 Combined effect of overweight and irregular menstruation on macrosomia study

	Unadjusted			Adjusted ^a
	OR (95% CI)	P-Value	P _trend	OR (95% CI)	P-Value	P _trend
Neither of them	1.00 (Reference)			1.00 (Reference)
Only BMI ≥ 24 kg/m² or irregular menstruation	2.12 (1.32, 3.43)	0.002	0.001	2.09 (1.26, 3.45)	0.004	0.001
Both BMI ≥ 24 kg/m² and irregular menstruation	13.05 (3.64, 46.80)	< 0.001		13.31 (3.54, 50.11)	< 0.001

Abbreviations: OR odds ratio, 95% CI 95% confidence interval, BMI body mass index is measured and defined as weight (kg) / height (m)²
^aLogistic regression model is adjusted for maternal age, maternal education level, parity and hair dye use

ISSN: 1471-2393