Table 2: Influence of vitamin D on morbidity with ARI and resulting (subjective) inability to work during the flu epidemic in Q1/2018 among 60 hospital employees in northern Bavaria.

Target variable:	ARI in Q1/2018 (one or more)				ARI-related inability to work (at least 1 day) in Q1/2018
Logistic regression	Bivariate		multivariate^*		Bivariate		multivariate^*
Logistic regression	OR (SD)	P	OR (SD)	P	OR (SD)	p	OR (SD)	p
Effect of Vitamin D (increase by 10 ng/ml)	0.92 (0.62-1.36)	0.6711	0.96 (0.64-1.44)	0.8489	1.03 (0.68-1.56)	0.8853	1.08 (0.71-1.65)	0.7156

^*with the variables "age" and "current influenza vaccine" in the model