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Table 4 Odds ratios for 28-day mortality for vitamin D supplementation in a bivariate analysis with an interaction term for the covariates. If the interaction term was not significant, the odds ratio of treatment adjusted for covariate without an interaction term was reported

From: Trying to identify who may benefit most from future vitamin D intervention trials: a post hoc analysis from the VITDAL-ICU study excluding the early deaths

Adjusting factors Odds ratio
Vitamin D vs. placebo
95% confidence limits p value Interaction term
p value
Age 0.60 0.34–1.06 0.082 0.997
Body mass index 0.56 0.33–0.95 0.032 0.385
1,25-Dihydroxyvitamin D, baseline 0.59 0.35–0.98 0.044 0.542
Charlson Comorbidity Index 0.63 0.37–1.06 0.081 0.552
SAPS 2 0.61 0.36–1.02 0.061 0.702
TISS day 0 0.58 0.34–0.99 0.049 0.800