TABLE 2.
Overview of means, mean differences and p-values on the Trail-Making Test.
| Study | Serotonergic psychedelic | Control | Weight | Mean difference | ||
|---|---|---|---|---|---|---|
| Mean (SD) | N | Mean (SD) | N | |||
| TMT-A (p = 0.98; I 2 = 9%) | ||||||
| Barbosa et al. (2016)* | 26.0 (6.92) | 30 | 28.07 (7.53) | 27 | 25.3% | −2.07 [−5.84, 1.70] |
| Doering-Silveira et al. (2005a) | 29.2 (8.86) | 40 | 27.25 (8.26) | 40 | 25.5% | 1.95 [−1.80, 5.70] |
| Halpern et al. (2005) | 23.9 (8.3) | 61 | 23.9 (7.0) | 78 | 49.3% | 0.00 [−2.60, 2.60] |
| TMT-B (p = 0.99; I 2 = 57%) | ||||||
| Barbosa et al. (2016)* | 57.96 (14.03) | 30 | 66.44 (21.63) | 27 | 29.2% | −8.48 [−18.06, 1.10] |
| Doering-Silveira et al. (2005b) | 61.38 (25.1) | 40 | 56.0 (15.82) | 40 | 30.4% | 5.38 [−3.81, 14.57] |
| Halpern et al. (2005) | 63.6 (20.6) | 61 | 61.6 (16.9) | 78 | 40.4% | 2.00 [−4.39, 8.39] |
* = Means and standard deviation courtesy of Barbosa et al.; N, sample size; SD, standard deviation; TMT, TrailMaking Test