Fig. 3From: Vitamin D deficiency among patients with pulmonary hypertensionThe 6MWT in the PH group. Significant correlation between distance covered in 6MWT (metres) and Vit D level (ng/ml), p < 0.01 (bilateral). Spearman’s rho correlation coefficient 0.36. 6MWT, 6-min walk test; PH, pulmonary hypertension; Vit D, vitamin DBack to article page