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Table 2 Regions of significance and voting for a positive treatment effect in three uncontrolled studies on Bosentan in PAH based on the approach presented in this paper

From: Regression toward the mean – a detection method for unknown population mean based on Mee and Chua's algorithm

Study

N

6MWD at Baseline

6MWD at week 16

correlation

region of significance

Vote of significance

Souza et al. 2005 [18]

15

396 ± 135

434 ± 137

r = 0.2

[0;337] & [672;∞]

Unlikely

    

r = 0.5

[0;300]

Unlikely

    

r = 0.8

-

Never

Provencher et al. 2006 [19]

99

322 ± 105

364 ± 109

r = 0.2

[0;347] & [410;∞]

Probably

    

r = 0.5

[0;367] & [481;∞]

Probably

    

r = 0.8

[0;448] & [1292;∞]

Most likely

Apostolopoulou et al. 2006 [20]

21

416 ± 105

459 ± 101

r = 0.2

[0;412] & [575;∞]

Unlikely

    

r = 0.5

[0;420] & [820;∞]

Unlikely

    

r = 0.8

[0;466]

Probably

  1. (N- number of patients, 6MWT-6-minute walk distance, data before and after intervention is mean ± standard deviation, region of significance: only 6MWD values > 0 reported)