Table 2. Study quality predicted by year of publication (full sample).
| Model | Outcome | B | SE | ß / OR | z- / t-value | df | p-value |
|---|---|---|---|---|---|---|---|
| Comparison type | Active controla | 0.072 | 0.056 | 1.07 | 1.30 | 140 | .195 |
| Specific active or EBTa | 0.045 | 0.055 | 1.05 | 0.82 | 140 | .414 | |
| EBTa | 0.00087 | 0.069 | 1.00 | 0.013 | 140 | .990 | |
| Sample size | Sample size | 3.35 | 1.92 | 0.15 | 1.75 | 140 | .082 |
| Follow-up | Any follow-up assessmenta | 0.048 | 0.055 | 1.05 | 0.88 | 140 | .378 |
| Length of follow-up | -0.073 | 0.18 | -0.05 | -0.41 | 77 | .686 | |
| Length of follow-up (includes zero) | 0.028 | 0.14 | 0.02 | 0.20 | 140 | .839 | |
| Treatment fidelity | Treatment fidelity reporteda | 0.13 | 0.067 | 1.14 | 1.94 | 140 | .053 |
| Instructor training | Any training in mindfulnessa | 0.019 | 0.060 | 1.02 | 0.31 | 140 | .755 |
| Protocol specific traininga | 0.003 | 0.056 | 1.00 | 0.053 | 140 | .958 | |
| ITT analysis | ITT analysis reporteda | 0.10 | 0.057 | 1.11 | 1.81 | 140 | .070 |
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).