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Table 1 Minimum sample size estimation a

From: Selenium Treatment and Chagasic Cardiopathy (STCC): study protocol for a double-blind randomized controlled trial

Parameters

Groups

 

Placebo (n= 65)

Selenium (n= 65)

Progression rate

54%

27%

Confidence level

95%

95%

Proportion

1:1

1:1

  1. aEstimate was calculated with an α error of 0.05, a β error of 0.20 and progression rates in 5 years.
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Trials

ISSN: 1745-6215