Breastfeeding and vitamin D supplementation reduce the risk of Kawasaki disease in a German population-based case-control study

Table 1 Measures of association for the matching factors sex, age and place of residence

	Matching factors
	Sex	Age	Place of residence
Measures of association
Phi coefficient	0.706
Contingency coefficient	0.577	0.945	0.945
Cramer’s V	0.706	0.961	0.961
Pearson correlation coefficient		0.901

ISSN: 1471-2431