| Methods |
A prospective, randomised, double‐blind, controlled, multicentre cross‐over study |
| Participants |
Participants were required to have at least 4 acne scars in the facial area that met the following criteria: soft‐contoured, rolling scars that were distensible and moderate to severe (3 or 4) on a validated 4‐point (1 ‐ 4) acne scar rating scale (ASRS) |
| Interventions |
Participants were randomised to receive either PMMA‐collagen or control injections of saline. At month 6, those who had received control injections could be treated with PMMA‐collagen |
| Outcomes |
Participants were deemed responders if 50% or more of their scars improved by at least 2 grades on the ASRS by both investigators and participants self assessments
Visits were scheduled every 2 weeks for the first month, then at month 3 and 6. All participants were followed for an additional 6 months after cross‐over |
| Notes |
Abstract only. Abstract does not contain enough information for 'Risk of bias' assessment and completion of the Characteristics of included studies table |
