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CompletedNCT02447978Updated Nov 1, 2015

Duration of Protection: GSK DTaP Vaccines

An observational study in Diphtheria, Acellular Pertussis and Tetanus, sponsored by GlaxoSmithKline. Completed. Open to participants aged 47 Months to 15 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2015-11-01.

Sponsored by GlaxoSmithKline · Observational

Study type
Observational
Enrollment
1
Ages
47 Months to 15 Years
Sex
All
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Study summary

The purpose of this study is to assess duration of protection for GSK DTaP vaccines in preventing pertussis.

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Conditions studied

  • Diphtheria
  • Acellular Pertussis
  • Tetanus

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In context

Diphtheria

265 studies on the registry are indexed under Diphtheria; 16 are open to participants now.

This study's enrollment of 1 is below the median of 682 across 23 observational studies indexed under Diphtheria.

Browse Diphtheria studies →

Lead sponsor

GlaxoSmithKline is the lead sponsor of 3,562 studies on the registry; 117 are open to participants now.

Of its 258 completed or terminated interventional studies of FDA-regulated products, 232 (90%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
47 Months to 15 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Kaiser Permanente Northern California (KPNC) member who received 5 doses of acellular pertussis vaccines between ages 1 month and 84 months at KPNC.

Eligibility criteria

Inclusion Criteria:

  • Kaiser Permanente Northern California (KPNC) member who received 5 doses of acellular pertussis vaccines be-tween ages 1 month and 84 months at KPNC.
  • The 5th dose was given between the ages of 47 and 84 months.
  • All 5 DTaP doses received were manufactured by GSK, depending on study objective (otherwise this criterion will not apply).
  • Born in 1999 and later.

Inclusion criteria for cases:

  • All individuals meeting above inclusion criteria who tested PCR-positive for pertussis and negative for parapertussis during the study period.

Inclusion criteria for PCR-negative controls:

  • All individuals meeting above inclusion criteria who tested PCR-negative for both pertussis and parapertussis during the study period.

Inclusion criteria for KPNC-matched controls:

  • All individuals from the general KPNC population meeting above inclusion criteria who match a PCR-positive case on sex, age, race or ethnic group, and medical center.
  • KPNC members on the day their matched case under-went the PCR test (anchor date).

Exclusion Criteria:

  • Individuals whose PCR test date (or anchor date) is less than 2 weeks after receiving their 5th DTaP dose.
  • Individuals who were not KPNC members for greater than 3 months between their 5th DTaP dose and PCR test date (or anchor date).
  • Individuals who received reduced antigen content pertussis vaccine (Tdap) or any pertussis-containing vaccine after their 5th DTaP dose but before their PCR test date (or anchor date).

Exclusion criteria for controls:

  • Individuals will be excluded from serving as a control once they test positive for pertussis.
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Study design

Enrollment
1 participant (actual)

Groups and cohorts

  • PCR-positive pertussis cases

    Cases will be all individuals who tested PCR-positive for pertussis and negative for parapertussis during the study period and who received 5 doses of DTaP vaccines (either manufactured by GSK or any brand, depending on study objective) through 84 months of age before testing PCR-positive.

    Biological: Infanrix · Biological: Pediarix · Biological: Kinrix

  • PCR-negative pertussis controls

    Controls will consist of persons who tested PCR-negative for both pertussis and parapertussis and who received 5 DTaP doses (either manufactured by GSK or any brand, depending on study objective) before testing PCR negative.

    Biological: Infanrix · Biological: Pediarix · Biological: Kinrix

  • KPNC-matched controls

    Controls will consist of all KPNC members of the same sex, age (year and quarter of birth), race or ethnic group (7 groups; 6 for reported, 1 for imputed), and medical centre as each pertussis case and who were members on the date the case tested PCR-positive (anchor date).

    Biological: Infanrix · Biological: Pediarix · Biological: Kinrix

Interventions

  • BiologicalInfanrix

    Diphtheria and Tetanus Toxoids and Acellular Pertussis Vaccine Adsorbed Indicated as a 5-dose series in infants and children 6 weeks to 7 years of age.

  • BiologicalPediarix

    Diphtheria and Tetanus Toxoids and Acellular Pertussis Ad-sorbed, Hepatitis B (Recombinant) and Inactivated Poliovirus Vaccine Indicated as a 3-dose series in infants born of hepatitis B surface antigen (HBsAg)-negative mothers. PEDIARIX may be given as early as 6 weeks of age through 6 years of age (prior to the 7th birthday).

  • BiologicalKinrix

    Diphtheria and Tetanus Toxoids and Acellular Pertussis Ad-sorbed and Inactivated Poliovirus Vaccine

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What researchers measure

Primary outcomes

  1. Estimated GSK-only DTaP relative decrease in protection against pertussis disease (PCR-confirmed)

    Estimation done by comparing time since the 5th DTaP dose between PCR-positive cases and PCR-negative controls

    Time frame: Between 1 and 84 months of age of the subjects who received all 5 doses of DTaP (GSK-only) vaccine

  2. Estimated DTaP (any brand) relative decrease in protection against pertussis disease (PCR-confirmed)

    Estimation done by comparing time since the 5th DTaP dose between PCR-positive cases and PCR-negative controls

    Time frame: Between 1 and 84 months of age of the subjects who received all 5 doses of DTaP (any brand) vaccine

Secondary outcomes

  1. Estimated GSK-only DTaP relative decrease in protection against pertussis disease (PCR-confirmed)

    Estimation derived from comparing PCR-positive cases and matched controls

    Time frame: Between 1 and 84 months of age of the subjects who received all 5 doses of DTaP (GSK-only) vaccine

  2. Estimated DTaP (any brand) relative decrease in protection against pertussis disease (PCR-confirmed)

    Estimation derived from comparing PCR-positive cases and matched controls

    Time frame: Between 1 and 84 months of age of the subjects who received all 5 doses of DTaP (any brand) vaccine

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Study locations

No study locations are listed for this record.

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References and documents

Publications

  • Klein NP, Bartlett J, Fireman B, Aukes L, Buck PO, Krishnarajah G, Baxter R. Waning protection following 5 doses of a 3-component diphtheria, tetanus, and acellular pertussis vaccine. Vaccine. 2017 Jun 8;35(26):3395-3400. doi: 10.1016/j.vaccine.2017.05.008. Epub 2017 May 12. PubMed 28506516 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 1, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02447978
Lead sponsor
GlaxoSmithKline
Responsible party
Sponsor
First posted
May 19, 2015
Start date
Feb 2015
Primary completion
Jun 2015
Completion
Jun 2015
Last update
Nov 1, 2015

Study contacts

GSK Clinical Trials
study director · GlaxoSmithKline
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Oct 2015. You cannot join it, but the record below documents what was studied.

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