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Figure 2 Mean change from baseline in results of the 6-min walk test at week 12 in all patients (ALL), in patients with primary pulmonary hypertension (PPH) and in patients with associated forms of pulmonary hypertension (APH). Analysis of covariance adjusted by baseline values showed that the mean distance walked in 6 min increased in patients who received beraprost (solid bars) compared with patients who received placebo (open bars) in ALL (p = 0.036) and in PPH patients (p = 0.035). No statistically significant changes were observed in APH patients (p = 0.676). Numbers at the tops of the bars = exact mean rates; lines = standard error of the mean. N = the number of patients in each group.
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