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SummaryMore than 50 interventions have been used to treat hidradenitis suppurativa (HS), and so therapy decisions can be challenging. Our objective was to summarize and appraise randomized controlled trial (RCT) evidence for HS interventions in adults. Searches were conducted in Medline, Embase, CENTRAL, LILACS, five trials registers and abstracts from eight dermatology conferences until 13 August 2015. Two review authors independently assessed study eligibility, extracted data and assessed methodological quality. Primary outcomes were quality of life and adverse effects of the interventions. Twelve trials, from 1983 to 2015, investigating 15 different interventions met our inclusion criteria. The median trial duration was 16 weeks and the median number of participants was 27. Adalimumab 40 mg weekly improved the Dermatology Life Quality Index (DLQI) by 4·0 points, which equates to the minimal clinically important difference for the scale, compared with placebo (95% confidence interval −6·5 to −1·5 points). Evidence quality was reduced to ‘moderate’ because the results are based on only a single study. Adalimumab 40 mg every other week was ineffective in a meta‐analysis of two studies comprising 124 participants. Infliximab 5 mg kg−1 improved the DLQI score by 8·4 points after 8 weeks in a moderate‐quality study completed by 33 of 38 participants. Etanercept 50 mg twice weekly was ineffective. Inclusion of a gentamicin sponge prior to primary closure did not improve outcomes. Other interventions, including topical and oral antibiotics, were investigated by relatively small studies, preventing treatment recommendations due to imprecision. More, larger RCTs are required to investigate most HS interventions, particularly oral treatments and surgical therapy. Moderate‐quality evidence suggests that adalimumab given weekly and infliximab are effective, whereas adalimumab every other week is ineffective.

We have assessed the value of patch testing from the patient's perspective and examined the impact of patch testing on their quality of life (QoL). 140 patients were recruited over 5 months. 2 questionnaires were designed to investigate the patient's views on patch testing. The 1st questionnaire was completed at the final visit to the clinic and the 2nd was posted 6 weeks later. The Dermatology Life Quality Index (DLQI) questionnaire was completed on both occasions. There was a significant improvement of the DLQI score in all patch-tested subjects (P = 0.003). Patients with involvement of the trunk had worse QoL. At the 4-day visit, 77 patients (55%) expressed the opinion that patch testing had been helpful. 6 weeks later, 71 patients replied. 47 patients were diagnosed as having allergic contact dermatitis: 87% of them found that patch testing had been useful, 91% were able to avoid the allergen(s) and 57% reported improvement/clearing in their skin condition. 58% of the 24 patients with negative results also found that patch testing had been beneficial. Overall, patient perception was that they understood verbal information (92%) better than written information (76%). Patch testing is beneficial to patients, leading to improved QoL. Patient perception was that they understood verbal advice better than written information.

Analysis 5.6. Comparison 5 Adalimumab every other week versus placebo, Outcome 6 Proportion with improvement in pain..... Analysis 5.7. Comparison 5 Adalimumab every other week versus placebo, Outcome 7 Change in Sartorius scale score (LOCF)