Table 4.
Within-group effect sizes and between-group effect sizes Cohen's d [95% CI] for all outcome measures.
| Measure and condition | Pre- to post-treatment assessment | Post-treatment assessment to six-month follow-up |
|---|---|---|
| FMPS Concern over Mistakes | ||
| ICBT-support | 1.40 [0.85, 1.92] | −0.19 [−0.67, 0.30] |
| ICBT-request | 1.00 [0.51, 1.47] | 0.13 [−0.33, 0.59] |
| ICBT-support vs. ICBT-request | 0.23 [−0.25, 0.70] | 0.10 [−0.37, 0.57] |
| FMPS Personal Standards | ||
| ICBT-support | 0.92 [0.40, 1.41] | −0.15 [−0.63, 0.34] |
| ICBT-request | 0.72 [0.24, 1.18] | 0.24 [−0.22, 0.70] |
| ICBT-support vs. ICBT-request | 0.03 [−0.44, 0.50] | 0.32 [−0.15, 0.79] |
| FMPS Doubts about Action | ||
| ICBT-support | 0.75 [0.24, 1.24] | −0.01 [−0.50, 0.47] |
| ICBT-request | 0.40 [−0.07, 0.85] | 0.26 [−0.20, 0.72] |
| ICBT-support vs. ICBT-request | 0.23 [−0.24, 0.70] | 0.05 [−0.42, 0.52] |
| FMPS Parental Expectations | ||
| ICBT-support | 0.27 [−0.22, 0.75] | 0.04 [−0.44, 0.53] |
| ICBT-request | 0.23 [−0.23, 0.68] | 0.02 [−0.43, 0.48] |
| ICBT-support vs. ICBT-request | 0.18 [−0.30, 0.64] | 0.20 [−0.27, 0.67] |
| FMPS Parental Criticism | ||
| ICBT-support | 0.31 [−0.18, 0.79] | −0.08 [−0.56, 0.40] |
| Wait-list | 0.10 [−0.36, 0.56] | 0.13 [−0.33, 0.58] |
| ICBT-support vs. ICBT-request | 0.26 [−0.21, 0.73] | 0.07 [−0.40, 0.54] |
| FMPS Organization | ||
| ICBT-support | 0.51 [0.02, 1.00] | −0.08 [−0.56, 0.40] |
| Wait-list | 0.25 [−0.21, 0.71] | 0.15 [−0.31, 0.60] |
| ICBT-support vs. ICBT-request | 0.21 [−0.26, 0.68] | 0.03 [−0.44, 0.50] |
| Clinical Perfectionism Questionnaire | ||
| ICBT-support | 1.41 [0.87, 1.95] | −0.25 [−0.73, 0.24] |
| ICBT-request | 1.19 [0.68, 1.67] | −0.03 [−0.49, 0.42] |
| ICBT-support vs. ICBT-request | 0.12 [−0.35, 0.59] | 0.10 [−0.37, 0.56] |
| Patient Health Questionnaire – 9 Items | ||
| ICBT-support | 0.72 [0.21, 1.21] | −0.14 [−0.62, 0.35] |
| ICBT-request | 0.49 [0.02, 0.94] | −0.04 [−0.49, 0.42] |
| ICBT-support vs. ICBT-request | 0.10 [−0.37, 0.57] | 0.00 [−0.47, 0.47] |
| Generalized Anxiety Disorder – 7 Items | ||
| ICBT-support | 0.93 [0.41, 1.42] | −0.42 [−0.91, 0.07] |
| ICBT-request | 0.73 [0.25, 1.19] | −0.12 [−0.58, 0.33] |
| ICBT-support vs. ICBT-request | 0.06 [−0.41, 0.53] | 0.32 [−0.16, 0.78] |
| Dysfunctional Attitude Scale | ||
| ICBT-support | 1.28 [0.74, 1.80] | −0.27 [−0.75, 0.22] |
| ICBT-request | 1.13 [0.63, 1.61] | 0.04 [−0.42, 0.49] |
| ICBT-support vs. ICBT-request | 0.29 [−0.19, 0.76] | 0.03 [−0.44, 0.50] |
| Brunnsviken Brief Quality of Life Scale | ||
| ICBT-support | 0.84 [0.33, 1.33] | −0.10 [−0.59, 0.38] |
| ICBT-request | 0.59 [0.11, 1.04] | 0.01 [−0.45, 0.46] |
| ICBT-support vs. ICBT-request | 0.41 [−0.07, 0.88] | 0.26 [−0.21, 0.73] |
| Self-Compassion Scale – Short-Form | ||
| ICBT-support | 1.27 [0.72, 1.78] | −0.11 [−0.59, 0.37] |
| ICBT-request | 1.14 [0.64, 1.62] | 0.00 [−0.45, 0.46] |
| ICBT-support vs. ICBT-request | 0.16 [−0.31, 0.63] | 0.03 [−0.44, 0.50] |
FMPS = Frost Multidimensional Perfectionism Scale; ICBT = Internet-Based Cognitive Behavior Therapy.