Fig. 4
From: Vitamin D deficiency in critically ill children: a systematic review and meta-analysis
Interaction between overall study mortality rate and impact of vitamin D deficiency on mortality. Metaregression analysis confirming the interaction between baseline mortality rate and impact of vitamin D deficiency on mortality. Significantly higher odds of death were evident in patients with vitamin D deficiency originating from studies with lower mortality (p = 0.02). Size of the data markers indicates the weight of the study, with larger circles indicating smaller studies