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Table 2 Newcastle-Ottawa Scale for Risk of Bias Assessment of Cohort Studies Included in the Meta-Analysis

From: Effects and safety of the combination of platelet-rich plasma (PRP) and hyaluronic acid (HA) in the treatment of knee osteoarthritis: a systematic review and meta-analysis

Study Selection Comparability Outcome Overall
Representativeness of Exposed Cohort Selection of Nonexposed Ascertainment of Exposure Outcome Not Present at Start Assessment of Outcome Adequate Follow- Up Length Adequacy of Follow-Up
Michele Abate et al. 2015 [17] 9
Yanqing Guo et.al 2016 [19] 9
  1. ,score of 1; , score of 2; ,score of 0