. 2017 Oct 31;12(10):e0187298. doi: 10.1371/journal.pone.0187298

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 control^a	0.086	0.059	1.09	1.45	109	.146
	Specific active or EBT^a	0.057	0.059	1.06	0.97	109	.334
	EBT^a	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 assessment^a	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 reported^a	0.12	0.071	1.13	1.75	109	.081
Instructor training	Any training in mindfulness^a	0.070	0.066	1.07	1.07	109	.283
	Protocol specific training^a	0.040	0.06	1.04	0.66	109	.509
ITT analysis	ITT analysis reported^a	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).