Skip to main content

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.