Estimated means and mean differences comparing baseline to follow-ups using linear mixed models (n=88)
| Outcome | Estimated mean (SE) | Mean difference (95% CI) | P values | Effect size* (95% CI) |
| BDD-YBOCS | ||||
| Baseline (n=88) | 27.7 (0.58) | na | na | na |
| Post-treatment (n=81) | 19.5 (0.83) | −8.23 (−9.92 to −6.54) | P<0.001 | 1.25 (0.91 to 1.57) |
| 3 months (n=75) | 19.0 (0.91) | −8.67 (−10.38 to −6.96) | P<0.001 | 1.35 (1.01 to 1.68) |
| 12 months (n=54) | 15.3 (1.17) | −12.3 (−14.53 to −10.25) | P<0.001 | 1.72 (1.33 to 2.11) |
| 24 months (n=56) | 14.3 (1.32) | −13.42 (−15.57 to −11.27) | P<0.001 | 1.79 (1.40 to 2.18) |
| MADRS-S | ||||
| Baseline (n=88) | 18.9 (0.96) | na | na | na |
| Post-treatment (n=77) | 14.9 (1.14) | −3.97 (−5.94 to −1.99) | P<0.001 | 0.46 (0.16 to 0.78) |
| 3 months (n=65) | 13.7 (1.15) | −5.20 (−7.40 to −3.00) | P<0.001 | 0.66 (0.33 to 0.99) |
| 12 months (n=37) | 12.7 (1.26) | −6.21 (−8.69 to −3.72) | P<0.001 | 0.75 (0.36 to 1.14) |
| 24 months (n=44) | 13.8 (1.34) | −5.04 (−7.55 to −2.54) | P<0.001 | 0.62 (0.25 to 0.99) |
| GAF | ||||
| Baseline (n=88) | 56.2 (0.71) | na | na | na |
| Post-treatment (n=81) | 62.5 (0.85) | 6.31 (4.73 to 7.88) | P<0.001 | 0.87 (0.55 to 1.19) |
| 3 months (n=75) | 63.0 (0.87) | 6.83 85.25 to 8.42) | P<0.001 | 0.97 (0.64 to 1.30) |
| 12 months (n=54) | 66.1 (0.92) | 9.92 (8.22 to 11.63) | P<0.001 | 1.36 (0.99 to 1.74) |
| 24 months (n=56) | 67.0 (1.24) | 10.77 (8.63 to 12.91) | P<0.001 | 1.47 (1.09 to 1.84) |
| EQ5D | ||||
| Baseline (n=88) | 0.686 (0.026) | na | na | na |
| Post-treatment (n=77) | 0.711 (0.029) | 0.025 (−0.033 to 0.084) | P=0.393 | 0.20 (−0.11 to 0.50) |
| 3 months (n=65) | 0.783 (0.022) | 0.097 (.036 to 0.158; | P=0.002 | 0.52 (0.20 to 0. 85) |
| 12 months (n=37) | 0.799 (0.027) | 0.113 (.045 to 0.181) | P=0.001 | 0.51 (0.12 to 0.90) |
| 24 months (n=44) | 0.760 (0.037) | 0.074 (−0.003 to 0.152) | P=0.062 | 0.29 (−0.07 to 0.65) |
BDD-YBOCS, Yale-Brown obsessive compulsive scale modified for body dysmorphic disorder; EQ5D, EuroQol EQ5D; GAF, Global Assessment of Functioning; MADRS-S, Montgomery-Åsberg Depression Rating Scale Self-Rated; na, not applicable.
*Cohen’s d effect sizes between groups calculated from observed data.