Table 1.

Characteristics of the studies included in this meta-analysis.

		Participants			Rx dose /Guidance Method /Injection Location
Study, year, country	Study design	Number PRP/Cor	Age(years) PRP/Cor	Male% PRP/Cor	PRP	Cor	Follow up	Outcomes
Barreto et al., 2019, Brazil	RCT	26/25	53.2 ± 9.4/53 ± 11	42.3%/28%	3 ml of PRP extracted from centrifuged 15 mL of patient's peripheral blood and manual platelet separation with micropipettes/ Not guided by ultrasound subacromial/ Subacromial space through a posterior approach	Not available	1 month, 3 months, 6 months	UCLA SRS, CMS, DASH
Ibrahim et al., 2019, Egypt	RCT	15/15	46.8 ± 10.6/41.5 ± 12.5	40%/46.7%	2 ml of PRP extracted from centrifuged 20 ml of patient's blood/ Under ultrasound guidance/ Subacromial lateral approach	1 ml of methylprednisolone acetate and 1 ml of local anesthetic (lidocaine)/Under ultrasound guidance/Subacromial lateral approach	2 months	VAS, SDQ, ROM, Ultrasound findings
Pasin et al., 2019, Turkey	RCT	30/30	49.4 ± 9.1/47.7 ± 9.6	41.1%	4 ml of PRP extracted from centrifuged 10 ml of patient's blood/ Not available/ The subacromial space	A single dose of 40 mg/ml triamcinolone acetonide and 3 ml lidocaine/Not available/The subacromial space	3 weeks, 8 weeks	VAS, SDQ, Quick DASH, UCLA SRS, SF-36 scores
Sari et al., 2020, Turkey	RCT	30/30	52.1 ± 10.8	35.8%	5 ml of PRP extracted from centrifuged 10 ml of patient's blood/ Under ultrasound guidance/ The lateral subacromial injection method	2 ml 40 mg triamcinolone acetonide (Artropan),2 ml 1% lidocaine and 1 ml saline/under ultrasound guidance/The lateral subacromial injection method	3 weeks, 12 weeks, 24 weeks	VAS, ASES, WORC
Say et al., 2016, Turkey	RCT	30/30	49.2 ± 7/50.2 ± 2.7	33.3%/40%	2.5 ml of PRP extracted from centrifuged 30 cc of patient's peripheral blood/ Not available/ Administered via a dorsolateral approach through the interval just beneath the dorsal acromial edge	A mixture of 1 ml 40 mg methylprednisolone and 8 ml prilocaine/Not available/ Administered via a dorsolateral approach through the interval just beneath the dorsal acromial edge	6 weeks, 6 months	The Constant score, VAS, ROM
Shams et al., 2016, Egypt	RCT	20/20	52 ± 12/50 ± 10	50%/55%	2–2.5 ml of PRP extracted from centrifuged 10 ml of patient's blood/ Not available/Posterolateral approach	Kenacort-A 40 mg, (triamcinolone acetonide, suspension)/Not available/ Posterolateral approach	6 weeks, 12 weeks, 6 months	ASES, CMS, SST, VAS, MRI grades