Effectiveness of Hyaluronic Acid Administration in Treating Adhesive Capsulitis of the Shoulder: A Systematic Review of Randomized Controlled Trials

Table 1

Detailed reasons for exclusion of individual studies.

Author	Year	Reasons for exclusion
Leardini et al. [16]	1988	Non-RCT (prospective uncontrolled study); Mixed diagnosis in the experimental group (OA, Duplay’s disease, combined OA and Duplay’s disease); Follow-up duration shorter than 1 month (11 days)
Itokazu and Matsunaga [17]	1995	Non-RCT (prospective uncontrolled study); Mixed diagnosis in the experimental group (subacromial bursitis, tendinitis, and capsulitis); Duration of symptoms shorter than 1 month in some subjects
Tamai and Yamato [15]	1997	Non-RCT (observational study)
Tamai et al. [18]	1999	Follow-up duration shorter than 1 month (7 days); Primary intention was not treatment of AC; Participants in the AC group were the same as Tamai et al., 2004 [8]
Tamai et al. [8]	2004	Non-RCT (prospective uncontrolled study); Follow-up duration shorter than 1 month (1 week); Primary intention was not treatment of AC
Blaine et al. [19]	2008	Mixed diagnosis in the experimental group (OA, rotator cuff tear, and/or AC)
Lee et al. [20]	2009	Combined treatment (triamcinolone and hyaluronic acid injections); Primary intention was comparison of injection guidance

AC: adhesive capsulitis; OA: osteoarthritis; RCT: randomized controlled trial.