Table 1.

Detailed description of the 7 studies about PRP clinical application in the systematic review.

Author	Level of evidence	Patient/hip treated	Age (years)	Staging	Technique	Follow-up	Hip survivorship (%)
Houdek et al. [48]	Level II prospective descriptive study	22/35	43	Steinberg stage I, II	PRP/BmMSCs/core decompression	36 months	90%
Pak [52]	Level V case report	2/2	29, 47	Stage IV	PRP/AdMSC mixture under ultrasound guidance	3 months	100%
Pak [51]	Level V case report	2/2	34, 39	Stage IV	PRP/AdMSC mixture under ultrasound guidance	16 months	100%
Pak et al. [53]	Level V case report	1/1	43	Ficat classification stage I	PRP/AdMSC mixture under ultrasound guidance	21 months	100%
Guadilla et al. [55]	Level V case report	4/4	/	Steinberg stage IIa, IIb	PRP/autologous bone grafting/core decompression through arthroscopy	14 months	100%
Samy [56]	Level II prospective descriptive study	30/40	36.7	Modified Ficat classification stages IIb and III	PRP/autologous bone grafting/core decompression	41.4 months	90%
D'Ambrosi et al. [58]	Level II prospective descriptive study	16/24	42	All the Ficat classification	PRP/MSCs/synthetic bone graft/core decompression	75 months	50% (80% for early patients and 28.6% for late patients)

PRP: platelet-rich plasma; BmMSCs: bone marrow-derived mesenchymal stem cells; AdMSCs: adipose-derived MSCs.