QUARTZ: Comparative Effectiveness of Switching From Albuterol to Albuterol/Budesonide Versus Adding Low-dose ICS or LTRA to Albuterol (QUARTZ)
17. september 2026 oppdatert av: AstraZeneca
QUARTZ: Comparative Effectiveness of Switching From Albuterol to Albuterol/Budesonide Versus Adding Low-Dose Inhaled Corticosteroids or Leukotriene Receptor Antagonists to Albuterol Among Adults With Asthma in the United States
The QUARTZ study is a retrospective observational cohort study using a prevalent new-user design and U.S. healthcare claims data to evaluate treatment effectiveness among patients with asthma.
The study compares the real-world effectiveness of switching from albuterol-only rescue therapy to albuterol/budesonide versus adding low-dose inhaled corticosteroids (ICS) or leukotriene receptor antagonists (LTRA) while continuing albuterol.
The primary objective is to assess the comparative effectiveness of these treatment strategies in reducing severe asthma exacerbations in routine clinical practice in the United States.
Studieoversikt
Studietype
Observasjonsmessig
Registrering (Antatt)
8000
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiekontakt
- Navn: AstraZeneca Clinical Study Information Center
- Telefonnummer: 1-877-240-9479
- E-post: information.center@astrazeneca.com
Studiesteder
-
-
Delaware
-
Wilmington, Delaware, Forente stater, 19803
- Rekruttering
- Research Site
-
-
Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
- Voksen
- Eldre voksen
Tar imot friske frivillige
Nei
Prøvetakingsmetode
Ikke-sannsynlighetsprøve
Studiepopulasjon
Adults asthma patients
Beskrivelse
Inclusion Criteria:
- Asthma patients with at least one prescription record (identified by NDC or Healthcare Common Procedure Coding System [HCPCS] codes) for Airsupra (Airsupra cohort), LD ICS or LTRA, (comparator cohort) since January 2023.
- Patients with at least one prescription record (based on NDC or HCPCS codes) of albuterol within the 12 months prior to the first Airsupra or the controller medications prescription date
- Patients aged ≥18 years on the index date
- Patients with ≥12 months of continuous insurance enrolment prior and 12 months after index date.
Exclusion Criteria:
- Patients with at least one medical claim with an ICD-10 code within the 12 months prior to the index date for any of the chronic respiratory conditions or systemic inflammatory diseases routinely treated with systemic corticosteroids (SCS)
- Patients with any prescription record for any ICS or other controller therapies (including SAMA, LABA, LAMA, LTRA, theophylline or biologics) within the 12 months prior to the and inclusive of index date (the index therapy defining cohort entry (LD ICS for the LD ICS cohort; LTRA for the LTRA cohort is permitted on the index date)
- Patients with maintenance OCS use within the 12 months prior to and inclusive of the index date
- Airsupra patients with a concomitant SABA prescription record on the index date
Studieplan
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
Kohorter og intervensjoner
Gruppe / Kohort |
Intervensjon / Behandling |
|---|---|
|
Airsupra cohort
Patients who switch from albuterol to Airsupra (albuterol/budesonide) as their rescue therapy.
|
Not applicable since it's an observational study.
There are three study cohorts: 1) Airsupra cohort 2)Albuterol and low-dose ICS comparator cohort and 3) Albuterol and LTRA comparator cohort.
Andre navn:
|
|
Albuterol and low-dose ICS comparator cohort
Patients who add low-dose inhaled corticosteroid (ICS) to their ongoing albuterol rescue regimen.
|
Not applicable since it's an observational study.
There are three study cohorts: 1) Airsupra cohort 2)Albuterol and low-dose ICS comparator cohort and 3) Albuterol and LTRA comparator cohort.
Andre navn:
|
|
Albuterol and LTRA comparator cohort
Patients who add leukotriene modifiers (LTRA) to their ongoing albuterol rescue regimen.
|
Not applicable since it's an observational study.
There are three study cohorts: 1) Airsupra cohort 2)Albuterol and low-dose ICS comparator cohort and 3) Albuterol and LTRA comparator cohort.
Andre navn:
|
Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Severe exacerbations during follow-up: annualized asthma exacerbation rates (AAER) by cohort, overall and by setting (IP, ED/urgent care, outpatient); plus absolute rates and rate ratios comparing Airsupra with each comparator cohort
Tidsramme: Follow-up starts the day after index and ends at the earliest of death, data end, insurance disenrollment, loss to follow-up, or switch to the alternative rescue treatment, up to 36 months; add-on maintenance therapy does not censor follow-up.
|
To describe and compare the occurrence of severe exacerbations observed among the Airsupra cohort and each comparator cohort.
|
Follow-up starts the day after index and ends at the earliest of death, data end, insurance disenrollment, loss to follow-up, or switch to the alternative rescue treatment, up to 36 months; add-on maintenance therapy does not censor follow-up.
|
Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Time to first severe exacerbation: KM curves, median time by arm (if estimable), and Cox PH HRs comparing Airsupra with each comparator. Also, the proportion with at least 1 severe exacerbation at 3, 6, 9, and 12 months after treatment initiation.
Tidsramme: Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
To describe and compare the time to first severe exacerbation among the Airsupra cohort and each comparator cohort.
|
Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
|
Cumulative inhaled corticosteroid exposure (beclomethasone equivalent µg/year)
Tidsramme: Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
To describe exposure to corticosteroid treatments among the Airsupra cohort and each comparator cohort
|
Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
|
Cumulative systemic corticosteroid exposure (prednisone equivalent mg/year)
Tidsramme: Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
To describe exposure to corticosteroid treatments among the Airsupra cohort and each comparator cohort
|
Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
|
Total SCS exposure days
Tidsramme: Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
To describe exposure to corticosteroid treatments among the Airsupra cohort and each comparator cohort
|
Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
|
SCS burst rates
Tidsramme: Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
To describe exposure to corticosteroid treatments among the Airsupra cohort and each comparator cohort
|
Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months
|
Andre resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Follow-up HCRU rates by arm: all-cause, asthma-related, and exacerbation-related use, including IP admissions, ED/urgent care, primary care, specialist outpatient visits, plus chest X-rays, oxygen treatment, and spirometry.
Tidsramme: Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months.
|
To describe healthcare resource use (HCRU) among the Airsupra cohort and each comparator cohort.
|
Follow-up period for each patient starts the day after the index date and ends at the earliest date of death, end of data, end of insurance enrollment, loss to follow up, or switch to the alternative rescue treatment up to 36 months.
|
Samarbeidspartnere og etterforskere
Det er her du vil finne personer og organisasjoner som er involvert i denne studien.
Sponsor
Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart (Faktiske)
3. august 2026
Primær fullføring (Antatt)
30. september 2026
Studiet fullført (Antatt)
30. september 2026
Datoer for studieregistrering
Først innsendt
3. august 2026
Først innsendt som oppfylte QC-kriteriene
21. august 2026
Først lagt ut (Faktiske)
26. august 2026
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
18. september 2026
Siste oppdatering sendt inn som oppfylte QC-kriteriene
17. september 2026
Sist bekreftet
1. september 2026
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- D6930R00011
Plan for individuelle deltakerdata (IPD)
Planlegger du å dele individuelle deltakerdata (IPD)?
JA
IPD-planbeskrivelse
Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal Vivli.org. All requests will be evaluated as per the AZ disclosure commitment:
https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.
Yes, indicates that AZ are accepting requests for IPD, but this does not mean all requests will be shared.
IPD-delingstidsramme
AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA PhRMA Data Sharing Principles.
For details of our timelines, please refer to our disclosure commitment at: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.
Tilgangskriterier for IPD-deling
When a request has been approved AstraZeneca will provide access to the anonymized individual patient-level data via secure research environment Vivli.org.
Signed Data Usage Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information.
Legemiddel- og utstyrsinformasjon, studiedokumenter
Studerer et amerikansk FDA-regulert medikamentprodukt
Ja
Studerer et amerikansk FDA-regulert enhetsprodukt
Nei
Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .