Table-2.

Study characteristic and demographic data of included studies.

Sl No	Authors	Study design	No. of patients	Male: Female	Age (years) mean or median (±SD)	Mean or median (±SD) follow up period (months)
1.	Cross et al. 19927	Retrospective study	4a	NR	NR	6
2.	Eriksson et al.199918	Prospective study	11	8:3	Median 24	6–12
3.	Papandrea et al.200026	Prospective study	40	29:11	28	24
4.	Eriksson et al. 200136	Retrospective study	6	6:0	25	20.5
5.	Eriksson et al.200119	Prospective study	16	14:2	26	MRI,median:7 histology, median:10
6.	Rispoli et al.200127	Prospective study	20	13:7	37	32
7.	Nakamura et al.200439	Retrospective study	8	5:3	24	37
8.	Tadokoro et al.200442	Retrospective study	28	10:18	22.2	67.2
9	Williams et al.200431	Prospective study	8	6:2	19.3(±4.1)	4–9
10.	Burks et al.20058	Prospective study	9	5:4	28	12
11	Nakamae et al.200522	Prospective study	29	15:14	28	12
12.	Takeda et al.200629	Prospective study	11	6:5	20.5	12.7
13.	Okahashi et al.200625	Prospective study	11	8:3	23	12
14.	Nishino et al.200623	Prospective study	23	10:13	22 ± 4	23
15.	Nakamae et al.201240	Retrospective study	39	22:17	Group-1: 29.5(±12.2) & Group-2: 27.1 (±11.4)	6 or 12
16.	Snow et al.201241	Retrospective study	10	7:3	33	129
17.	Murakami et al.201221	Prospective study	20	11:9	23.1	15
18.	Choi et al.201217	Prospective study	45	45:0	32.7(±7.3)	36.4(±7.4)
19.	Alhen et al.201233	Retrospective study	19	10:9	Median 23	Median: 100.8
20.	Bedi et al.201335	Retrospective study	15 (18 knees)	6:9	27	12.8
21.	Janssen et al.201320	Prospective study	22	17:5	28.4(±5)	12
22.	Stevanovic et al.201328	Prospective RCT	50	35:15	25(±4)	USG: 24, Biopsy-NR
23.	Alhen et al.201434	Retrospective study	18	10:8	Median 23	Median: 102 ± 18
24.	Nomura et al.201424	Prospective study	24	14:10	21(±2)	27.7 (±18.2)
25.	Zaccherotti et al.201532	Prospective study	20	14:6	26.1	24
26.	Tsifountoudis et al.201530	Prospective study	47	42:5	M-27.6 and F-31.2	24
27.	Konrath et al.201637	Retrospective study	20	14:6	29(±7)	24
28.	Suijkerbuijk et al. 201812	Prospective study	79	NR	Median 25.2	24
29.	Albertoni et al.201816	Prospective study	29(30 knees)	26:3	32	17
30.	Lee et al.201938	Retrospective study	120 (60 in each group)	112:8	S-group-27.4(±6.6) & D-group-26.9(±7.3)	36

^aOut of 225 patients only 4 were analyzed in detail for regeneration of hamstring tendon, NR-not reported, SD-Standard deviation.