Has platelet-rich plasma any role in partial tears of the anterior cruciate ligament? Prospective comparative study

Table 1 Details of the baseline and platelet rich plasma platelets and white cells concentrations

	Initial platelet concentration	PRP	%
Platelets, median (IQR)	264500 (247000-278000)	1125500 (1088000-1340500)	444 (407-519)
WC, median (IQR)	5200 (4790-6480)	600 (220-810)	10 (3-15)

IQR: Interquartile range; PRP: Platelet rich plasma; WC: White cells.

Table 2 Demographic data

	Group 1, n = 21	Group 2, n = 19	P value
Age in yr, median (IQR)	25 (22-39)	31 (26-34)	0.54
Male, n (%)	15 (71.4)	19 (100)	0.02
FU in mo, median (IQR)	25 (18-36)	25 (18-30)	0.86
MRI tear location:
Proximal, n (%)	10 (48)	12 (63)
Mid-substance, n (%)	11 (52)	7 (27)

FU: Follow-up; IQR: Inter quartile range; MRI: Magnetic resonance imaging; TAL: Tegner activity level.

Table 3 Results at final follow-up

Baseline	Group 1, n = 21	Group 2, n = 19	P value
Lysholm score, median (IQR)	69.5 (43.0-85.0)	54.0 (41.0-77.0)	0.41
IKDC score, median (IQR)	58.5 (44.0-60.0)	58.0 (44.0-60.0)	0.84
TAL, mean ± SD	6.90 ± 1.07	6.70 ± 1.18	0.65
At final follow-up
Lysholm score, median (IQR)	80 (75-90)	80 (73-86)	0.53
IKDC score, median (IQR)	77 (71-89)	71 (70-79)	0.33
TAL, mean ± SD	6.70 ± 1.52	6.50 ± 1.61	0.7
RTS rate, n (%)	20 (95)	18 (95)	0.9
Time to RTS in mo, mean ± SD	3.8 ± 0.8	4.3 ± 1.2	0.09
Failure rate, n (%)	7 (33)	6 (31)	0.9

IKDC: International Knee Documentation Committee; IQR: inter quartile range; RTS: return to sports; SD: Standard deviation; TAL: Tegner activity level.

Table 4 Magnetic resonance image Van Meer classification at baseline and at 6 mo

	MRI Van Meer classification
	Group 1	Group 2	P value
Baseline MRI, mean ± SD	6.1 ± 1.7	6.2 ± 2.4	0.97
MRI at 6 mo follow-up, mean ± SD	3.4 ± 2.9	3.6 ± 2.5	0.82

MRI: Magnetic resonance image; SD: Standard deviation.