1. Summary of comparisons.
| Comparison | Number of studies | Number of randomised participants | Number of ulcers |
| Pressure ulcer | |||
| Lysine hyaluronate vs sodium hyaluronate | 1 | 50 | 54 |
| PRGF + HA vs PRGF | 1 | 115 | 124 |
| Foot ulcer | |||
| HA vs LC | 1 | 20 | 20 |
| HA vs conventional dressing (sterile petrolatum gauze) | 1 | 34 | 34 |
| Leg ulcer | |||
| HA + HC vs HC | 1 | 125 | 125 |
| HA vs HC | 1 | 170 | 170 |
| HA vs paraffin gauze | 1 | 17 | 24 |
| HA vs neutral vehicle | 4 | 526 | 526 |
| HA vs dextranomer | 1 | 51 | 51 |
HA: hyaluronic acid; HC: hydrocolloid; LC: lyophilised collagen; PRGF: platelet‐rich growth factor