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PIH
Compare the procedure groups used for this indication, ranked by evidence grade. Each grade comes from an expert read of the actual studies (design, quality, on-topic relevance); direction reflects what those studies conclude.
| Grade | Direction | Procedure group | RCT & meta | Clinical & observational | Case reports | Total papers |
|---|---|---|---|---|---|---|
| C | Limited | Chemical peel | 44 | 32 | 21 | 199 |
| D | Limited | Laser toning qswitched or picosecond | 60 | 35 | 51 | 198 |
| F | Insufficient | Picosecond laser pigment | 48 | 12 | 25 | 126 |