Table 2.
Mean ARS scores at t0, t1 and t2 for the FFD group and the subgroups included in the fMRI tasks.
| N | Mean ARS score | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| t0 (SD) | t1 (SD) | t2 (SD) | t1 versus t0 | t2 versus t1 | ||||||
| Cohen’s d | Difference (95% CI) | p valuea | Cohen’s d | Difference (95% CI) | p valuea | |||||
| FFD | 79 | 46.7 (5.1) | 46.2 (5.8) | 22.7 (15.6) | − 0.08 | − 0.5 (− 1.3, 0.3) | 0.25 | − 1.99 | − 23.4 (− 27.0, − 19.9) | < 0.0001 |
| Stop-signal task | 53 | 46.7 (4.6) | 46.6 (5.4) | 21.5 (15.1) | − 0.02 | − 0.1 (− 1.0, 0.9) | 0.87 | − 2.21 | − 25.1 (− 29.4, − 20.9) | < 0.0001 |
| Flanker task | 32 | 46.9 (4.4) | 46.9 (4.9) | 20.8 (16.1) | 0.00 | 0.03 (− 1.4, 1.4) | 0.96 | − 2.19 | − 26.2 (− 31.8, − 20.5) | < 0.0001 |
ARS attention-deficit hyperactivity disorder (ADHD) rating scale (minimum = 0, maximum = 54), CI confidence interval, FFD few-foods diet, SD standard deviation, t0 screening, t1 before start FFD, t2 at the end of the FFD.
aPaired t test.