Dear R-list,

I have to design the validation of a score (ordinal values between 0 and 6) reputed to separate 4 groups of patients with known frequencies in the population. I think the more accurate is to calculate sample size under median test. Is there a function for that in R (not in the pwr package)?

Thanks in advance, with all my best, erik S.




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Erik-André SAULEAU
 
SEAIM
Centre Hospitalier
87, Avenue d'Altkirch
BP 1070
68051 Mulhouse Cédex
Tel: 03 89 64 67 53
Mel: sauleauea@ch-mulhouse.fr
Web: www.ch-mulhouse.fr
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Registre des Cancers du Haut-Rhin
9, Rue du Dr Mangeney
BP 1370
68070 Mulhouse Cédex
Tel: 03 89 64 62 51
Web: www.arer68.org
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