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NCT Number: NCT07633158

Prospective, Non-interventional Single-arm Study With Tezepelumab to Investigate the Change in Clinical and Patient-reported Outcomes in Patients With CRSwNP in Real-world (PETRICHOR)

PETRICHOR is a prospective, non-interventional, single-arm, multi-centre study in Germany evaluating real-world clinical and patient-reported outcomes in adults with severe chronic rhinosinusitis with nasal polyps (CRSwNP), whose disease is inadequately controlled with systemic corticosteroids (SCS) and/or surgery. Eligible participants are newly initiated on subcutaneous tezepelumab in routine clinical practice, in accordance with the European Summary of Product Characteristics (SmPC). Treatment decisions are made jointly by patients and their physicians, independent of study enrollment. No additional diagnostic or monitoring procedures are applied; data are collected using epidemiological methods at baseline and during routine clinical visits for up to 104 weeks.

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Key information

Conditions

Chronic Rhinosinusitis With Nasal Polyps (CRSwNP)

Age range

18 year–130 year

Sex eligibility

All sexes

Study type

Observational

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • - Participant must be 18 years of age or older, at the time of signing the informed consent.
  • - Confirmed diagnosis of CRSwNP for at least 12 months prior to routine care visit 1.
  • - Stable standard of care (SoC) treatment with Intranasal corticosteroids (INCS) for CRSwNP for at least 30 days prior to routine care visit 1.
  • - Physician decision that participant is eligible for treatment with Tezepelumab according to locally approved CRSwNP label.
  • Participants must be able and willing to read and comprehend written instructions, to collect Patient-reported outcome (PROs) and medication intake via app or alternative mode (paper) and to sign the informed consent document. Use of the mobile app is optional; participants without smartphones will not be excluded. Mode of data capture will be recorded and adjusted for in analyses where relevant.
  • - Participants who will be enrolled after index date need to have at least one measurement for SNOT-22 prior (within a maximum of 4 weeks) to index date.
  • - -

Exclusion criteria

  • - Participants who participate in an observational study that might influence the assessment of the current study (participants can be part of the German National Registry for Chronic rhinosinusitis (GENRE-CRS)); or participate in an interventional clinical trial in the last 3 months.
  • - Concurrent biologic therapy for CRSwNP or Asthma except where the last dose was administered ≥ 30 days. Stable allergen immunotherapy (defined as a stable dose and regimen at the time of enrolment) is allowed.
  • - Endoscopic NP surgery within 6 months prior to index date.
  • - Condition (acute or chronic) that, in the investigator's opinion, would limit the participant's ability to complete questionnaires or participate in this study.
  • - History of documented anaphylactic reactions/hypersensitivity/serious allergic reactions (immune complex disease) following any biologic therapy.
  • - Known hypersensitivity to Tezepelumab or any of its excipients.
  • - Pregnancy, planned pregnancy or lactation period.
  • - -

Treatment and study plan

Primary outcomes

  1. Mean change from baseline in sino-nasal symptoms measured by SNOT-22 total score at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during each routine care visit

    To describe changes from baseline in patient-reported sino-nasal symptoms as evaluated by Sinonasal outcome test (SNOT)-22 total score following initiation of tezepelumab treatment.

    SNOT-22 scores are participant-reported and assess physical problems, functional limitations and emotional consequences of SinoNasal conditions. Patient-reported symptom severity and symptom impact over the past 2 weeks are captured via a 6-point scale (0-No Problem to 5-Problem as bad as it can be). The total score is the sum of item scores and has a range from 0 to 110 (higher scores indicate poorer outcomes).

Secondary outcomes

  1. Proportion of SNOT-22 total score responders (minimal clinically important difference (MCID) from baseline = -8.9) at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe responder proportion in sino-nasal symptoms as evaluated by SNOT-22 total score following initiation of tezepelumab treatment.

  2. Mean change from baseline in NB measured by VAS-NB at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in nasal blockage (NB) as evaluated by a visual analog scale (VAS)-NB following initiation of tezepelumab treatment.

    VAS-NB is a 10-cm line with a bottom anchor of 0 = None and 10 = As bad as you can imagine. Participants will be requested to answer the following question: Please rate your [NB] at its worst over the previous 14 days.

  3. Proportion of NB responders (minimal clinically important difference (MCID) from baseline = -3.0; in participants with VAS-NB ≥ 7 at baseline) at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in nasal blockage (NB) as evaluated by a VAS-NB following initiation of tezepelumab treatment.

  4. Mean change from baseline in loss of smell score evaluated by SST-12/16.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in sense of smell as evaluated by Sniffin Sticks Test (SST)-12/16 odours following initiation of tezepelumab treatment.

    SST-12/16 is a validated tool to assess the chemosensory olfactory performance of an individual. The SST is based on 12 or 16 pen-like odor dispensing devices. The participant will have to name the smell using a multiple-choice form which offers 4 answers for every pen, only one of the answers is correct. Participants with a SST-16 result will be converted to the range of SST-12 results through percentage based conversion.

  5. Proportion of SST-16 responders (MCID from baseline = 3) at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in sense of smell as evaluated by SST-12/16 odours following initiation of tezepelumab treatment.

  6. Proportion of participants in each category of olfactory function based on SST-12 results (normosmia 11-12, hyposmia 7-10 and anosmia 0-6) at clinical routine visits. Participants with a SST-16 result will be converted to the range of SST-12 results.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in sense of smell as evaluated by SST-12/16 odours following initiation of tezepelumab treatment.

  7. Mean change from baseline in loss of smell score evaluated by VAS-Smell.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in sense of smell as evaluated by VAS-Smell following initiation of tezepelumab treatment.

  8. Proportion of VAS-Smell responders (MCID from baseline = -3.0; in participants with VAS-Smell ≥ 7 at baseline) at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in sense of smell as evaluated by VAS-Smell following initiation of tezepelumab treatment.

  9. Mean change from baseline in NP severity as measured by VAS-NP symptoms at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in nasal polyp (NP) severity as evaluated by VAS-NP. The VAS-NP is a 10-cm line with a bottom anchor of 0 = None and 10 = As bad as you can imagine. Participants will be requested to answer the following question: Please rate your [loss of smell] at its worst over the previous 14 days.

  10. Proportion of NB responders (MCID from baseline = -3.0; in participants with VAS-NB ≥ 7 at baseline) at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in nasal polyp (NP) severity as evaluated by VAS-NP.

  11. Mean change from baseline in total NPS evaluated by nasal endoscopy by analysing data at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in nasal polyp score (NPS) following initiation of tezepelumab treatment.

    The NPS is the sum of the right and left nostril scores (maximum 8), as evaluated by nasal endoscopy. Total NPS is graded based on polyp size described in Gevaert et al. 2023.

    (0=no polyps; 1= Small polyps in the middle meatus not reaching below the inferior border of the middle turbinate ; 2= Polyps reaching below the lower border of the middle turbinate; 3= Polyps reaching the lower border of the inferior turbinate or a middle meatal polyp with a score of 2 with any additional polyp medial to the middle turbinate; 4= Large polyps causing complete or near complete obstruction of the inferior nasal cavity i. e., touching the floor of the nose).

  12. Proportion of NPS responders (MCID from baseline = -1.0) at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe changes in nasal polyp score (NPS) following initiation of tezepelumab treatment.

  13. Proportion of participants who respond as 'well controlled' or 'completely controlled' NP symptoms to the patient-reported NP control question at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe responder proportion for NP control evaluated by patient-reported NP control question following initiation of tezepelumab treatment.

    The NP control question was adapted from the asthma control test (ACT) and asks participants to rate how controlled their NP condition has been over the past 2 weeks. Response options are: Not controlled at all, Poorly controlled, Somewhat controlled, Well controlled, and Completely controlled.

  14. Mean change from baseline in average SCS daily dose (only for long-term use) after initiating tezepelumab at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe overall prescribed systemic cortico steroids (SCS) in participants following initiation of tezepelumab.

  15. Proportion of participants who reduced/stopped using SCS (only for long-term use) after initiating tezepelumab at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visitit

    To describe overall prescribed systemic cortico steroids (SCS) in participants following initiation of tezepelumab.

  16. Proportion of participants with CRSwNP-related, asthma-related and other-disease-related SCS use at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe overall prescribed systemic cortico steroids (SCS) in participants following initiation of tezepelumab.

  17. Mean change from baseline in average cumulative SCS use in participants at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe overall prescribed systemic cortico steroids (SCS) in participants following initiation of tezepelumab.

  18. Proportion of participants with ≥ 500, 1000 and 2000 mg cumulative SCS at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe overall prescribed systemic cortico steroids (SCS) in participants following initiation of tezepelumab.

  19. Proportion of participants who are considered as 'good' (4-5 criteria), 'moderate' (2-3 criteria) or 'no - poor response' (0-1 criteria) based on EUFOREA 2023 criteria.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe proportion of participants who show response based on European Forum for Research and Education in Allergy and Airway diseases (EUFOREA) 2023 criteria (1: Reduced NP size (NPS), 2: Reduced need for SCS/ salvage surgery, 3: improved QoL (SNOT-22), 4: improved sense of smell (VAS-Smell or SST), 5: Reduced impact of comorbidities (ACT for asthma)) following initiation of tezepelumab.

  20. Proportion of participants who reach 5 EUFOREA 2023 criteria at clinical routine visits.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe proportion of participants who show response based on EUFOREA 2023 criteria.

  21. Proportion of participants with AEs, SAEs.

    Time frame: From Baseline up to 104 weeks, during clinical routine visit

    To describe the safety and tolerability of tezepelumab treatment. Safety evaluated based on type of Adverse Event (AE), intensity, causal relationship to treatment, duration, handling, outcome, and seriousness.

Study contacts

Contact information is provided by the study sponsor or research team.

AstraZeneca Clinical Study Information Center

CONTACT

[email protected]

1-877-240-9479

Sponsors and collaborators

Lead sponsor

AstraZeneca

Industry

Registry information

Acronym: PETRICHOR

Important dates

Study start
2026
Primary completion
2029
Study completion
2029
First posted
Jun 8, 2026
Registry last updated
Jun 8, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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