Table 3.
Results of confirmatory analysis
| Task | N |
Supplement effect 3-way ANOVA, inkl. diet |
Supplement effect 2-way ANOVA |
Crea. score | Pl. score |
Crea.-Pl. scores M(SE) [95% CI] |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total | Crea. first | Pl. first | F (df) | p | η2P | F (df) | p | η2P | ||||
| BDS | 121 | 61 | 60 | 3.41 (1, 117) | 0.067 | 0.028 | 3.49 (1, 119) | 0.064 | 0.029 | 8.85 (0.28) | 8.44 (0.25) | 0.41 (0.22) [–0.24; 0.84] |
| RAPM | 118 | 60 | 58 | 1.02 (1, 114) | 0.315 | 0.009 | 0.97 (1, 116) | 0.327 | 0.008 | 12.39 (0.28) | 12.16 (0.28) | 0.23(0.23) [− 0.24; 0.70] |
Mixed 3-way ANOVA with supplement (creatine vs placebo) as the within-subjects variable, supplement order (creatine-first vs placebo-first) and diet (vegetarian vs omnivore) as the between-subjects variable and test score after supplementation as the dependent variable. Mixed 2-way ANOVA without diet. The test score is given as estimated marginal mean (standard error). P-values are two-tailed. The two cognitive tasks are the Backward Digit Span and Raven’s Advanced Progressive Matrices