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QUARTZ: Comparative Effectiveness of Switching From Albuterol to Albuterol/Budesonide Versus Adding Low-dose ICS or LTRA to Albuterol (QUARTZ)

17. september 2026 opdateret af: 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.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Undersøgelsestype

Observationel

Tilmelding (Anslået)

8000

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • Delaware
      • Wilmington, Delaware, Forenede Stater, 19803
        • Rekruttering
        • Research Site

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

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

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Intervention / 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 navne:
  • Observationsstudie
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 navne:
  • Observationsstudie
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 navne:
  • Observationsstudie

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
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
Foranstaltningsbeskrivelse
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
Foranstaltningsbeskrivelse
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.

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

3. august 2026

Primær færdiggørelse (Anslået)

30. september 2026

Studieafslutning (Anslået)

30. september 2026

Datoer for studieregistrering

Først indsendt

3. august 2026

Først indsendt, der opfyldte QC-kriterier

21. august 2026

Først opslået (Faktiske)

26. august 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

18. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

17. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • D6930R00011

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (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.

IPD-delingsadgangskriterier

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.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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