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Fig. 2. Error barplots showing the effect of oral Mg supplementation in Mg deficient patients. Values shown are mean and 95% CI before (visit 1) and after (visit 2) supplementation. Closed squares and interrupted line denote patients not improving Mg stores after supplementation (non-responders, n=11), closed circles and closed line denote the responders (n=10). *p<0.05 and **p<0.005 in the paired comparison before versus after supplementation. 
p<0.05 and p<0.005 in the between-groups comparison responders versus non-responders.
