Table 2. Mean blood lactate for subjective placebo responders (n = 3) and percentage difference from mean blood lactate for placebo non-responders (n = 9) in informed caffeine/received caffeine and informed caffeine/received placebo conditions.
Condition |
Lactate mmol·l |
Difference (%) from placebo non-responders |
Chances effect is clinically beneficial (trivial/harmful)+ |
|
Mean (SD) |
Mean (SD) |
95% CI* |
|
Informed caffeine/received caffeine |
7.4 (0.8) |
19.3 (49.0) |
-26.6 to 65.2 |
17 (4/80) |
Informed caffeine/received placebo |
7.2 (1.1) |
16.7 (49.1) |
-27.1 to 60.4 |
19 (4/77) |
95% CI = 95% confidence interval. smallest worthwhile effect of 1.5%.