Table 2 Reporting of the number needed to treat (NNT) and corresponding 95% confidence interval (CI) in randomised controlled trials (RCTs) with time-to-event outcomes in leading medical journals in the years 2003–2005
From: Calculation of NNTs in RCTs with time-to-event outcomes: A literature review
No. of articles | ||||
|---|---|---|---|---|
Journal | RCTs with time-to-event data | NNT | Appropriate NNT calculation | CI for NNT |
BMJ | 17 | 2 | 0 | 0 |
JAMA | 89 | 9 | 4 | 2 |
Lancet | 111 | 10 | 6 | 1 |
NEJM | 156 | 13 | 7 | 3 |
Total | 373 | 34 (9.1%) | 17 (50%) | 6 (17.6%) |