Intended for healthcare professionals

Endgames Statistical Question

Number needed to treat II

BMJ 2011; 342 doi: https://doi.org/10.1136/bmj.d2664 (Published 04 May 2011) Cite this as: BMJ 2011;342:d2664

Which of the two parameters (NNH or NNT) is positive or negative?

Dr Sedgwick says in two different endgames:

-The value of number needed to harm is always positive. ((BMJ 2011;342:d2811)

-The number needed to treat is always a positive number. (BMJ 2011;342:d2664)

Which of the two parameters (NNH or NNT) is positive or negative? We stand confused.

Competing interests: No competing interests

12 July 2018
Neeru Gupta
Scientist F
Akshun Jani, Jugal Kishore.
Indian Council of Medical Research
Ansari Nagar, New Delhi-110029.