Meta-Analysis and Evidence Base for the Efficacy of Autologous Bone Marrow Mesenchymal Stem Cells in Knee Cartilage Repair: Methodological Guidelines and Quality Assessment

Table 1

Characteristics	No. of studies	References
Follow-up duration
0-6 months	2	[23, 35]
7-12 months	11	[28, 29, 34, 41, 42, 44–46, 48, 55]
13-24 months	8	[30, 32, 41, 47, 50–52, 62]
Up to 36 months	3	[25, 26, 38]
Over 3 years	6	[31, 33, 35–37, 39]
Cellular dose
Less than 10 million	7	[24, 27, 36, 41, 45, 52, 55]
10-20 million	5	[27, 29, 50, 51, 56]
More than 20 million	6	[23, 29, 44, 46–48]