title: [Reflections on some methodological errors in the evaluation of drugs. Ten years experience at the National Marketing Authorization Commission].
abstract: A ten year experience at the national french marketing authorization committee has permitted to notice the most commonly methodological errors in the field of clinical research and, particularly, in the dossiers for drug approval: a frequent insufficient sample size resulting in lack of statistical power, an unsatisfactory optimal dosing research, a misuse of the so-called surrogate markers, an erroneous opinion about the meaning of the p value, an abusive claim for equivalence in non significant superiority trials, a misuse of unadjusted multiple comparisons and too much confidence in subgroup analysis results.
authors.affiliation: Laboratoire de Thérapeutique, Faculté de Médecine de Marseille-13285 Marseille.
authors.forename: G
authors.initials: G
authors.lastname: Bouvenot
mesh_terms: D015982:Bias; D003627:Data Interpretation, Statistical; D017277:Drug Approval / Q000379:methods*; D004341:Drug Evaluation / Q000379:methods* / Q000592:standards*; D016903:Drug Monitoring / Q000379:methods / Q000592:standards; D005602:France; D006801:Humans; D015203:Reproducibility of Results; D012107:Research Design / Q000592:standards*; D013810:Therapeutic Equivalency