Table 3. Mean heart rate (HR) for subjective placebo responders (n = 3) and percentage difference from mean heart for placebo non-responders (n = 9) in informed caffeine/received caffeine and informed caffeine/received placebo conditions.
Condition |
HR beatsĀ·min-1 |
Difference (%) from placebo non-responders |
Chances effect is clinically beneficial (trivial/harmful)+ |
|
Mean (SD) |
Mean (SD) |
95% CI* |
|
Informed caffeine/received caffeine |
161 (3) |
-2.3 (1.8) |
-4.1 to -0.6 |
0 (16/84) |
Informed caffeine/received placebo |
159 (1) |
-.3 (2.4) |
-3.1 to 2.5 |
8 (74/18) |
smallest worthwhile effect of 1.5%. 95% CI = 95% confidence interval.