Table 3. Study quality predicted by year of publication (European and North American sample only).
Model | Outcome | B | SE | ß/ OR | z- / t-value | df | p-value |
---|---|---|---|---|---|---|---|
Comparison type | Active controla | 0.086 | 0.059 | 1.09 | 1.45 | 109 | .146 |
Specific active or EBTa | 0.057 | 0.059 | 1.06 | 0.97 | 109 | .334 | |
EBTa | 0.035 | 0.073 | 1.04 | 0.48 | 109 | .635 | |
Sample size | Sample size | 4.16 | 2.19 | 0.18 | 1.90 | 109 | .060 |
Follow-up | Any follow-up assessmenta | 0.038 | 0.058 | 1.04 | 0.67 | 109 | .506 |
Length of follow-up | -0.054 | 0.17 | -0.04 | -0.32 | 57 | .750 | |
Length of follow-up (includes zero) | 0.021 | 0.13 | 0.02 | 0.16 | 109 | .872 | |
Treatment fidelity | Treatment fidelity reporteda | 0.12 | 0.071 | 1.13 | 1.75 | 109 | .081 |
Instructor training | Any training in mindfulnessa | 0.070 | 0.066 | 1.07 | 1.07 | 109 | .283 |
Protocol specific traininga | 0.040 | 0.06 | 1.04 | 0.66 | 109 | .509 | |
ITT analysis | ITT analysis reporteda | 0.12 | 0.061 | 1.13 | 1.98 | 109 | .048 |
Note: B = unstandardized regression coefficient; SE = standard error; ß = standardized regression coefficient; OR = odds ratio; df = degrees of freedom; EBT = evidence-based treatment; ITT = intent-to-treat.
a = logistic regression model used (and odds ratios reported).