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Trial · NCT05044195

Registered outcomes14

Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.

ListOutcomeTime frameDescription
PrimaryImmunogenicity Endpoint: Geometric Mean Titer (GMT) and GMT Ratio of Hemagglutination Inhibition (HI) Antibodies at Day 22 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine StrainsDay 22The GMT ratio is defined as the geometric mean of the postvaccination HI titer for Comparator QIV over the geometric mean of the postvaccination HI titer for aQIV.
PrimaryImmunogenicity Endpoint: Seroconversion Rate (SCR) and SCR Difference for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine StrainsDay 1 to Day 22
The SCR defined as the percentage of subjects with either a prevaccination HI titer \<1:10 and a postvaccination (Day 22) HI titer ≥1:40, or with either a prevaccination HI titer ≥1:10 and a ≥4-fold increase in postvaccination HI titer. The SCR difference is defined as the Comparator QIV SCR minus the aQIV SCR.
PrimaryImmunogenicity Endpoint: GMT and GMT Ratio of HI Antibodies at Day 22 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine StrainsDay 22The GMT ratio is defined as the geometric mean of the postvaccination HI titer for Comparator QIV over the geometric mean of the postvaccination HI titer for aQIV.
SecondaryImmunogenicity Endpoint: GMT and GMT Ratio of HI Antibodies at Day 181 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine StrainsDay 181The GMT ratio is defined as the geometric mean of the postvaccination HI titer for Comparator QIV over the geometric mean of the postvaccination HI titer for aQIV.
SecondaryImmunogenicity Endpoint: GMT of HI Antibodies on Day 1, Day 22, and Day 181 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine StrainsDay 1 to Day 181GMTs on Day 1 (prior to vaccination), Day 22 (3 weeks after vaccination), and Day 181 (6 months after vaccination) as determined by HI assay against each of the four vaccine strains
SecondaryImmunogenicity Endpoint: Geometric Mean Fold Increase (GMFI) for Day 22/Day 1 and Day 181/Day 1 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine StrainsDay 1 to Day 181The GMFI is defined as the geometric mean of the fold increase of postvaccination HI titer over the prevaccination HI titer.
SecondaryImmunogenicity Endpoint: The Percentage of Subjects With a Titer ≥1:40 at Day 1, Day 22, and Day 181 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine StrainsDay 1 to Day 181Percentage of subjects with a titer ≥1:40 on Day 1, Day 22, and Day 181 as determined by HI assay against each of the four vaccine strains
SecondaryImmunogenicity Endpoint: SCR at Day 22 and Day 181 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine StrainsDay 1 to Day 181
The SCR defined as the percentage of subjects with either a prevaccination HI titer \<1:10 and a postvaccination (Day 22 or Day 181) HI titer ≥1:40, or with either a prevaccination HI titer ≥1:10 and a ≥4-fold increase in postvaccination HI titer.
SecondarySafety Endpoint: Solicited Local and Systemic AEs for 7 Days Following VaccinationDay 1 through Day 7Number and percentage of subjects with solicited local and systemic AEs occurring for 7 days following vaccination
SecondarySafety Endpoint: All Unsolicited AEs for 21 Days Following VaccinationDay 1 through Day 22
The percentage of subjects with at least one unsolicited AE occurring 21 days following vaccination The severity of AEs is based on the maximum severity associated with a Preferred Term for a reported AE. Related AEs include possibly related AEs, probably related AEs and AEs with missing relatedness assessment. The severity and relatedness of AEs were determined by the investigator. For the any AE summary by severity, a subject with multiple AEs is counted according to the highest severity of their reported AEs.
SecondarySafety Endpoint: Serious Adverse Events (SAEs), Adverse Events (AEs) Leading to Withdrawal From the Study, and Adverse Events of Special Interest (AESIs)Day 1 through Day 271The percentage of subjects with any SAE, AE leading to withdrawal, or AESI during the study period
OtherImmunogenicity Endpoint: GMT and GMT Ratio of HI Antibodies at Day 22 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine Strains by Age (Subgroup Analysis)Day 22The GMT ratio is defined as the geometric mean of the postvaccination HI titer for Comparator QIV over the geometric mean of the postvaccination HI titer for aQIV.
OtherImmunogenicity Endpoint: GMT and GMT Ratio of HI Antibodies at Day 22 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine Strains by Influenza Vaccination History (Subgroup Analysis)Day 22The GMT ratio is defined as the geometric mean of the postvaccination HI titer for Comparator QIV over the geometric mean of the postvaccination HI titer for aQIV.
OtherImmunogenicity Endpoint: GMT and GMT Ratio of HI Antibodies at Day 22 for the A/H1N1, A/H3N2, B/Yamagata, and B/Victoria Vaccine Strains by Comorbidity Risk Score (Subgroup Analysis)Day 22The GMT ratio is defined as the geometric mean of the postvaccination HI titer for Comparator QIV over the geometric mean of the postvaccination HI titer for aQIV.

Source ClinicalTrials.govtrials-2026-11-12-0.5.0

Sources 3

  • ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
  • ClinicalTrials.govNo license stated
  • NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
  • ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
  • ClinicalTrials.govnone stated
  • NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)

ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.

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