ICU Vivas · Statistics & evidence
Data viva — interpreting a trial's results table
A data viva on trial interpretation — the 2x2 table, the RR/ARR/NNT, the confidence interval, and the significance.
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CICMFFICMEDIC
Prompt
A results table from a fictitious ICU trial (the 2x2 table and the CI), to be interpreted.
Stimulus
You are shown the 2x2 table from an RCT of a new vasopressor:
| Died | Survived | Total | |
|---|---|---|---|
| New drug | 30 | 170 | 200 |
| Control | 50 | 150 | 200 |
The reported RR = 0.60 (the 95 per cent CI 0.40 to 0.90). Interpret.[9]
References1ShowHide
- [9]Bersten AD, Soni N (eds) Oh's Intensive Care Manual. 8th edition, Elsevier, 2018.