Table 1. Mean oxygen uptake for subjective placebo responders (n = 3) and percentage difference from mean oxygen uptake for placebo non-responders (n = 9) in informed caffeine/received caffeine and informed caffeine/received placebo conditions.
Condition |
Oxygen uptake lĀ·min-1 |
Difference (%) from placebo non-responders |
Chances effect is clinically beneficial (trivial/harmful)+ |
|
Mean (SD) |
Mean (SD) |
95% CI* |
|
Informed caffeine/received caffeine |
3.5 (0.4) |
7.0 (10.9) |
-2.6 to 16.7 |
4 (8/89) |
Informed caffeine/received placebo |
3.6 (0.1) |
6.0 (11.6) |
-3.9 to 15.9 |
6 (11/83) |
smallest worthwhile effect of 1.5%. 95% CI = 95% confidence interval.