Table 6. Meta-Analysis of QIDS-SR16 scores across three studies.
N = number of participants; D = raw difference in means; d = standardized difference in means or Cohen’s d; g = standardized difference in means or Hedgen’s d; Vd = variance of d; Vg = variance of g; Y = effect size; VY = variance within; W = weight; WY = calculated quantity weight of effect size; WY2 = calculated quantity weight of effect size squared; W2 = weight squared; QIDS-SR16 = Quick Inventory of Depressive Symptomatology 16-Item Self Report
| Study | Treated | Control/Baseline | Effect size | Variance within | Weight | Calculated quantities | |||||||||||||
| Mean of QIDS-SR16 Score | SD of QIDS-SR16 Score | N | Mean of QIDS-SR16 Score | SD of QIDS-SR16 Score | N | D | Swithin | d | Vd | J | g | Vg | Y | VY | W | WY | WY2 | W2 | |
| Stroud et al. 2018 [12] | 7.65 | 5.34 | 17 | 18.88 | 2.23 | 17 | -11.23 | 4.09 | -2.744 | 0.23 | 0.98 | -2.68 | 0.22 | -2.68 | 0.22 | 4.59 | -12.30 | 32.98 | 21.09 |
| Carhart-Harris et al. 2017 [17] | 8.8 | 6.2 | 19 | 18.9 | 3 | 19 | -10.1 | 4.87 | -2.07 | 0.16 | 0.98 | -2.03 | 0.16 | -2.03 | 0.16 | 6.45 | -13.09 | 26.57 | 41.56 |
| Davis et al. 2021 [32] | 6 | 5.7 | 24 | 16.7 | 3.5 | 24 | -10.7 | 4.73 | -2.26 | 0.14 | 0.98 | -2.225 | 0.13 | -2.23 | 0.13 | 7.56 | -16.83 | 37.46 | 57.22 |