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References
1.
Cook
RJ
Sackett
DL
. The number needed to treat: a clinically useful measure of treatment effect . Bri Med J 1995 ; 310 : 452 –454 .
2.
Julious
SA
. Issues with number needed to treat . Stat Med 2005 ; 24 : 3233 –3235 .
3.
Furukawa
TA
Leucht
S
. How to obtain NNT from Cohen’s d: comparison of two methods . PLOS One 2011 ; 6 : 1 –5 .
4.
Cohen
J
. The cost of dichotomization . Appl Psychol Meas 1983 ; 7 : 249 –253 .
5.
MacCallum
RC
Zhang
S
Preacher
KJ
. On the practice of dichotomization of quantitative variables . Psychol Methods 2002 ; 7 : 19 –40 .
6.
Veiel
HOF
. Base-rates, cut-points, and interaction effects: the problem with dichotomized continuous variables . Psychol Med 1988 ; 18 : 703 –710 .
7.
Cohen
J
. Statistical power analysis for the behavioral sciences , Hillsdale, NJ : Lawrence Erlbaum Associates , 1988 .