The aim of this study is to generate real-world evidence to fill knowledge gaps regarding the response to secukinumab in patients with moderate to severe HS, its treatment patterns, the clinical characteristics of patients on secukinumab, healthcare resource utilization and the economic impact of HS in Italy.
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The study population will include male and female adult patients (aged ≥ 18 years) with a diagnosis of moderate or severe HS and initiating treatment with secukinumab according to clinical practice
Cohort
Other
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Proportion of patients achieving 55% reduction in IHS4 (IHS4-55) during the observational period.
Proportion of patients achieving International Hidradenitis Suppurativa Severity Score System 55% reduction(IHS4-55) during the observational period. The IHS4 is an exclusively physician-based, clinical scoring system for dynamic assessment of HS severity. Determining IHS4 requires counting nodules, abscesses and draining tunnels/sinus tracts, which is easy to calculate. The IHS4 score is calculated as the number of nodules (multiplied by 1) plus the number of abscesses (multiplied by 2) plus the number of draining tunnels (multiplied by 4). A score of 3 or less signifies mild HS, a score of 4-10 signifies moderate HS and a score of 11 or higher signifies severe HS
Proportion of patients achieving 55% reduction in IHS4 (IHS4-55) stratified by dosing
The proportion of patients achieving 55% reduction in IHS4 (IHS4-55) stratified by dosing (q4w / q2w regimen), at 6 months, 1 and 1.5 years after initiation of secukinumab treatment. The IHS4 is an exclusively physician-based, clinical scoring system for dynamic assessment of HS severity. Determining IHS4 requires counting nodules, abscesses and draining tunnels/sinus tracts, which is easy to calculate. The IHS4 score is calculated as the number of nodules (multiplied by 1) plus the number of abscesses (multiplied by 2) plus the number of draining tunnels (multiplied by 4). A score of 3 or less signifies mild HS, a score of 4-10 signifies moderate HS and a score of 11 or higher signifies severe HS
Proportion of patients achieving 75% reduction in IHS4 (IHS4-75) and 100% reduction in IHS4 (IHS4-100)
The IHS4 is an exclusively physician-based, clinical scoring system for dynamic assessment of HS severity. Determining IHS4 requires counting nodules, abscesses and draining tunnels/sinus tracts, which is easy to calculate. The IHS4 score is calculated as the number of nodules (multiplied by 1) plus the number of abscesses (multiplied by 2) plus the number of draining tunnels (multiplied by 4). A score of 3 or less signifies mild HS, a score of 4-10 signifies moderate HS and a score of 11 or higher signifies severe HS
Proportion of patients achieving 50% reduction in HiSCR (HiSCR-50) and 75% reduction in HiSCR (HiSCR-75)
The Hidradenitis Suppurativa Clinical Response (HiSCR) is defined as a ≥ 50% reduction in total AN count (abscesses + inflammatory nodules), and no increase in abscesses or draining tunnels when compared with baseline.
Number, type, and localization of HS lesions
lesion spread is defined as total abscess and inflammatory nodule count (AN) or draining fistulae in a body region not seen at baseline
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