Table 1.

Randomized controlled trials published subsequent to the latest systematic reviews on injection therapy

Author	Number randomized	Interventions	Outcome measures	Results
Kazemi et al24	60	Methylprednisolone or Autologous blood	Quick DASH PPT	At 4 weeks autologous blood superior in: severity of pain, pain in grip, PPT Quick DASH
			Modified Nirschl scores At 4 and 8 weeks	No differences in Nirschl score, grip strength, and limb function At 8 weeks autologous blood superior for all outcomes
Peerbooms et al16	100	PRP or Corticosteroid injection	VAS DASH	Significant improvement in PRP group over steroid group for pain and DASH. Corticosteroid group better initially and then declined PRP group progressively improved
Ozturan et al25	60	Corticosteroid injection or Autologous blood injection or ECSWT	Thomsen provocative testing Upper extremity functional scores, maximal grip strength	Corticosteroid injection significantly better for all outcomes at 4 weeks Autologous blood injection and ECSWT gave significantly better Thomsen provocative test results and upper extremity functional scores at 52 weeks The success rate of corticosteroid injection was 50%, which was significantly lower than the success rates for autologous blood injection (83.3%) and ECSWT (89.9%)

Abbreviations: ECSWT, extracorporeal shock wave therapy; PPT, pain pressure threshold; PRP, platelet-rich plasma; VAS, visual analog scale; DASH, Disabilities of the Arm, Shoulder and Hand questionnaire.