Sample size estimation

AG Angèle Gayet-Ageron
AJ Anne-Sophie Jannot
TA Thomas Agoritsas
SR Sandrine Rudaz
CC Christophe Combescure
TP Thomas Perneger
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We sought to detect a standardized effect size of 0.3 for each factor independently, leading to a total number of about 470 participants (with a type 1 error of 5 % and type 2 error of 10 %). Anticipating a low response rate (around 25 %), we estimated that 2’000 emails should be sent in order to obtain an adequate number of participants.

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