Table 3. Adverse events and complications of included studies.

Adverse event and complication records	Studies
No adverse events or complications with intra-articular injections for the PRP or HA groups	Dallari et al. [21], Di Sante et al. [22], Kraeutler et al. [24], Villanova-López et al. [26]
Pain during or after PRP or HA injection	Battaglia et al. [20], Doria et al. [23], Nouri et al. [25]
Superficial hematoma	Battaglia et al. [20]
Warmness, stiffness, and heaviness	Nouri et al. [25]