Allergic Rhinitis, Allergy, Asthma
Conditions
Keywords
Allergy immunotherapy, Sublingual immunotherapy (SLIT)-tablets, Grass, House dust mite, Retrospective cohort study, register-based
Brief summary
To assess the impact of SQ SLIT-tablets (SQ Grass SLIT-tablet and SQ HDM SLIT-tablet) in Danish and Swedish allergic rhinitis (AR) patients, with or without asthma, between 2007-2020.
Detailed description
Allergic rhinitis (AR) is an inflammatory disorder, characterised by pruritus, sneezing, rhinorrhoea, and nasal congestion. It is one of the most common disorders worldwide, with an estimated global prevalence of 10-30%. AR is a chronic and progressive disease, as the underlying respiratory allergy can progress into allergic asthma. The prevalence of asthma in patients with AR is high and estimated between 10-40%. The presence of AR commonly exacerbates asthma, increasing the risk of asthma exacerbations, emergency visits and hospitalisations for asthma. Recently, the high-quality retrospective cohort REACT study (ClinicalTrial.gov: NCT04125888) found that allergy immunotherapy (AIT) was associated with long-term reduction in AR medication use as well as significant reductions in both controller and reliever asthma medication and concurrent lower risk of asthma exacerbation and pneumonia in subjects with pre-existing asthma. The SQ sublingual immunotherapy (SLIT)-tablets have robust evidence from randomised controlled trials (RCTs), but real-world evidence (RWE) is needed to complement the findings from RCTs by looking at e.g. longer time horizons and broader patient populations. As the REACT study was not designed to specifically look at evidence-based AIT treatments like the SQ SLIT-tablets, the real-world effectiveness of SQ SLIT tablets remain to be further elucidated.
Interventions
DRUGSQ SLIT-tablet
SQ grass SLIT-tablet and/or SQ house dust mite SLIT-tablet
Sponsors
ALK-Abelló A/S
Quantify Research
Study design
Observational model
COHORT
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
5 Years to No maximum
Healthy volunteers
No
Inclusion criteria
AR-patients identified by having at least two dispensations of prescribed AR medications for two consecutive years and/or ICD10-codes of AR in specialty care For the SQ SLIT-tablet cohort: \- at least 2 dispensations within 365 days of SQ SLIT-tablets (ATC: V01AA02 and V01AA03) For the control cohort: \- unexposed subjects will be identified from the study population of AR-patients that may be eligible to receive SQ SLIT-tablets, but have not dispensed a prescription of SQ SLIT-tablets during the index year of the case or prior to that year
Exclusion criteria
\- Any allergy immunotherapy treatment prior to the index event
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Symptom-relieving medication use for allergic rhinitis | From pre-index to follow-up year(s), assessed from 2005 and up to 2021 | Overall number of prescriptions and by individual drug classes (prescribed products containing INCS or prescribed antihistamines ) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Medication use for asthma | From pre-index to follow-up year(s), assessed from 2005 and up to 2021 | Overall number of prescriptions and by individual drug classes |
| Asthma disease severity assessed by reliever and controller medication prescriptions and hospitalisations due to asthma | From pre-index to follow-up year(s), assessed from 2005 and up to 2021 | — |
| Lower airway infections assessed by prescriptions of antibiotics and diagnosis codes for pneumonia | From pre-index to follow-up year(s), assessed from 2005 and up to 2021 | — |
Countries
Denmark
Contacts
STUDY_DIRECTORSana Hussein, MSc
ALK
Outcome results
None listed