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

Table 5 Influence of vitamin D supplementation and breastfeeding on disease onset

	Age in months ^a (±SD)	Wilcoxon rank	Spearman correlation coefficient
	(n = 308 ^b)	p-value
Regularity of vitamin D supplementation ^c
Irregular	34.95 (±24.329)	0.534
Regular	35.56 (±26.592)	0.534
Duration of vitamin D supplementation in the first year of life in months
0–6	39.04 (±26.90)		−0.095
7–12	34.95 (±26.07)		−0.095
Duration of breastfeeding ^d
< 2 weeks	36.14 (±23.691)	0.802
> 2 weeks ^c	36.51 (±27.093)	0.802

^a at onset of fever, ^b only KD cases, ^c refers only to cases that got vitamin D (n = 244), ^d includes partially breastfed cases

ISSN: 1471-2431