Table 1.

Characteristics of the studies included

Study	Year	Level of evidence	Technique	Imaging tool	Graft	Measurement level	Measurement method	Femur fixation device	Tibia fixation device	Sample size	Time of measurement (months)
Baumfeld et al. [9]	2008	IV	TT	x-ray	auto HT	1 cm from the aperture	Absolute change and relative percentage	Rigidfix	Intrafix	26	45.2
								EB	BIS + staple or screw and washer	20	41.8
Kong et al. [10]	2012	IV	TT	x-ray	auto HT	1 cm from the aperture	Absolute change	Rigid fix	Intrafix	56	57.4
								EB	BIS + metal screw and washer	35	55.5
Lopes et al. [11]	2017	III	AMP	CT	auto HT	5 mm from the aperture	Absolute change and relative percentage	Rigid fix	BIS	20	13.1
								EB	BIS	23	13.8
Saygi et al. [12]	2016	IV	TT	x-ray	auto HT	1 cm from the aperture	Absolute change and relative percentage	Cross-pin	BIS + staple	43	42.7
								Toggle Loc	BIS + staple	50	38.8
Srinivas et al. [13]	2016	II	NC	CT	auto HT	Mid-point	Absolute change	Cross-pin	Interference Screw or Suture Disc	17	12
								EB	Interference Screw or Suture Disc	5	12
Uzumcugil et al. [14]	2012	III	TT	x-ray	auto HT	1 cm from the aperture	Absolute change and relative percentage	Transfix	BIS + staple	29	29.4
								EB	BIS + staple	133	32.3

AMP Anteromedial portal, BIS Bioabsorbable interference screw, EB Endobutton, HT Hamstring tendon, NC Not commended, TT Transtibial