Table 1.

Characteristics of primary studies (s = 12).

Characteristics	k	Min	Q1	Mdn.	Q3	Max	Mean	SD
Mean age (years)	10	25.73	26.60	28.96	29.78	31.51	28.43	1.92
Total Sample size at analysis
-MBI group	12	12.00	22.00	35.00	45.25	51.00	33.17	13.45
-Control group	12	8.00	13.75	31.00	41.75	51.00	29.17	13.99
Weeks of structured MBI	10	2.00	6.25	10.00	12.00	12.00	8.90	3.73
Days across intervention (length)	10	7.00	42.88	63.00	77.00	77.00	56.75	24.56
Structured MBI session/week	10	1.00	1.00	2.50	5.50	14.00	3.90	4.04
Structured MBI min./session	10	20.00	20.00	55.00	78.75	120.00	54.50	33.70
Dose (length x duration)	10	210.0	1540.0	3005.0	4462.0	4620.0	2816.0	1577.4
Days after intervention measured	12	.00	.00	.00	.00	61.00	7.41	18.69
% Attrition, MBI group	12	.00	.00	1.88	17.93	32.00	8.66	12.44
% Attrition, Control group	12	.00	.00	6.73	17.39	38.46	11.55	14.46

s = number of studies providing data, Min = minimum, Q1 = first quartile, Mdn = median, Q3 = third quartile, Max = maximum.