PUBLISHED ASSESSMENT

Influenza Vaccination During Pregnancy: Influenza Seasons 2002-2012, Vaccine Safety Datalink - PubMed

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A large, provider-verified cohort strongly supports the reported rise in influenza vaccination coverage and identified associations. Independent surveys broadly contextualize the trend. The principal weakness is causal wording about the 2004 recommendation change, because the retrospective observational design cannot fully separate policy effects from secular and system-level changes. Reporting is comparatively clear, but data, code, and some methodological and disclosure details remain unavailable.

Evidence support

Substantial (74/100)

The central coverage trend is based on provider-verified records from 721,898 pregnancies across six Vaccine Safety Datalink sites.
The study compares its estimates with independent national surveys and reports broad consistency.
Regression analysis supports associations between vaccination and specified predictors.
The claim that the 2004 recommendation change positively caused increased uptake is stronger than the observational design can firmly establish.
Vaccine Safety Datalink members are not necessarily representative of all pregnant women in the United States.

Balance & context

Substantial (68/100)

The article distinguishes full pregnancy cohorts from live-birth-only analyses and compares differing survey methodologies.
It contextualizes changes around the 2004 recommendation and 2009 H1N1 pandemic.
It recognizes shortcomings of self-reported national estimates.
The conclusion gives limited weight to secular trends, healthcare-system interventions, vaccine availability, and other explanations for increased uptake.
Generalizability beyond participating integrated healthcare systems requires greater emphasis.

Transparency

Substantial (76/100)

Authors, affiliations, publication date, DOI, study design, cohort size, outcomes, predictors, and statistical significance are clearly reported.
Tables and season-specific estimates make key results inspectable.
Funding is identified through a CDC/HHS contract.
The underlying data, analysis code, and complete operational definitions are not directly accessible from the supplied record.
The supplied record does not display a conflict-of-interest statement.

Confidence and coverage

Confidence in this analysis: Moderate confidence

Evidence coverage: Substantial coverage

Assessment relied partly on the abstract and indexed full-text extracts rather than uninterrupted access to every section.
Underlying patient-level data and analytic code were unavailable.
Some historical comparison sources were accessible only as bibliographic records.

The abstract, indexed full-text extracts, historical ACIP guidance, and comparison-study records were available.
Incomplete access to the full methods, limitations, and disclosure sections constrained verification.

Sources considered

Prevention and Control of Influenza: Recommendations of the Advisory Committee on Immunization Practices (ACIP), 2004 — Confirms the historical recommendation context, including vaccination of pregnant women.
Surveillance of Influenza Vaccination Coverage—United States, 2007–08 Through 2011–12 Influenza Seasons — Provides national survey estimates used to compare and contextualize coverage trends.
Seasonal Influenza Vaccine Coverage Among Pregnant Women: Pregnancy Risk Assessment Monitoring System — Provides an independent survey-based estimate for pregnant women, particularly live births.

This assesses evidence and presentation; it is not an overall truth verdict.

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Published assessment trend

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Evidence support — solid blueBalance & context — dashed purpleTransparency — dotted green

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Recorded public scores (0–100)
Date	Evidence support	Balance & context	Transparency
2026-09-12 (current)	74	68	76