A network meta-analysis of the relative efficacy of treatments for actinic keratosis of the face or scalp in Europe

Stefan Vegter, Keith Tolley, Stefan Vegter, Keith Tolley

Abstract

Background: Several treatments are available for actinic keratosis (AK) on the face and scalp. Most treatment modalities were compared to placebo and therefore little is known on their relative efficacy.

Objectives: To compare the different treatments for mild to moderate AK on the face and scalp available in clinical practice in Europe.

Methods: A network meta-analysis (NMA) was performed on the outcome "complete patient clearance". Ten treatment modalities were included: two 5-aminolaevulinic acid photodynamic therapies (ALA-PDT), applied as gel (BF-200 ALA) or patch; methyl-aminolevulinate photodynamic therapy (MAL-PDT); three modalities with imiquimod (IMI), applied as a 4-week or 16-week course with 5% imiquimod, or a 2-3 week course with 3.75% imiquimod; cryotherapy; diclofenac 3% in 2.5% hyaluronic acid; 0.5% 5-fluorouracil (5-FU); and ingenol mebutate (IMB). The only data available for 5% 5-FU was from one small study and was determined to be too limited to be reliably included in the analysis. For BF-200 ALA and MAL-PDT, data from illumination with narrow-band lights were selected as these are typically used in clinical practice. The NMA was performed with a random-effects Bayesian model.

Results: 25 trials on 5,562 patients were included in the NMA. All active treatments were significantly better than placebo. BF-200 ALA showed the highest efficacy compared to placebo to achieve total patient clearance. BF-200 ALA had the highest probability to be the best treatment and the highest SUCRA score (64.8% and 92.1%), followed by IMI 5% 4 weeks (10.1% and 74.2%) and 5-FU 0.5% (7.2% and 66.8%).

Conclusions: This NMA showed that BF-200 ALA, using narrow-band lights, was the most efficacious treatment for mild to moderate AK on the face and scalp. This analysis is relevant for clinical decision making and health technology assessment, assisting the improved management of AK.

Conflict of interest statement

Competing Interests: The research was funded by Biofrontera, Germany. The authors have no other conflict of interests that are directly relevant to the content of this paper.

Figures

Figure 1. Flow-chart of study selection.
Figure 1. Flow-chart of study selection.
Figure 2. Treatment network for the NMA.
Figure 2. Treatment network for the NMA.
Figure 3. Absolute clearance rates (bars ±…
Figure 3. Absolute clearance rates (bars ± SE; left axis) and ranking according to the probability to be the best treatment (yellow dots; right axis) and the SUCRA score (yellow squares; right axis).

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