This population-based retrospective cohort study aimed to assess temporal patterns and identify factors associated with first recorded pneumococcal vaccination among adults with diabetes. Investigators used linked administrative healthcare databases from the Romagna Local Health Authority in Italy. Individuals were followed through June 30, 2024.
The study included a total of 77,138 adults with diabetes. The cohort was divided into 57,113 prevalent cases and 20,025 incident cases. Follow-up extended to June 30, 2024, though the abstract does not report additional details on inclusion/exclusion criteria, baseline characteristics beyond counts, or the exact calendar window for cohort entry for all participants.
The primary outcome reported in the abstract was first recorded pneumococcal vaccination. Monthly coverage was estimated using a person-time approach. Time-to-first-vaccination in the incident cohort was analyzed and expressed as cumulative probabilities at prespecified timepoints.
Overall documented coverage increased from 7.2% in January 2017 to 28.0% in June 2024 but remained below 30% during the study period. The abstract highlights that the largest monthly gains in coverage were observed during influenza vaccination seasons, indicating that seasonal influenza campaigns may drive opportunistic pneumococcal vaccine delivery or co-administration.
Among the 20,025 incident diabetes cases, cumulative probabilities of having received a first pneumococcal vaccination were reported as:
The authors note there was not a marked early increase in uptake immediately after cohort entry, suggesting delayed or gradual vaccine uptake among newly diagnosed patients rather than rapid vaccination at or near diagnosis.
The study used multiple time-to-event methods. Monthly coverage used a person-time approach. Time-to-vaccination and associated factors were examined with Kaplan–Meier survival estimates, Cox proportional hazards models, and competing-risks methods. Death was explicitly treated as a competing event in some analyses to assess how mortality influenced associations with comorbidity and uptake.
Age demonstrated the strongest association with pneumococcal vaccine uptake, with peak uptake in the 60–69 year age group. Foreign citizenship was associated with markedly lower uptake. Associations with sex and comorbidity were described as more modest. The authors report that estimates related to comorbidity were attenuated or reversed when death was modeled as a competing event, indicating that higher comorbidity may be correlated with competing mortality, which can bias conventional survival estimates.
Key findings reported in the abstract are that overall pneumococcal vaccination coverage among adults with diabetes increased over the study window but remained below 30%, and that influenza vaccination seasons were periods of greatest monthly uptake gains. Age and citizenship emerged as important determinants of uptake, with foreign citizenship linked to lower vaccine receipt. The abstract implies potential missed opportunities for vaccination, particularly outside influenza season and early after diabetes diagnosis.
Limitations and other contextual details were not fully reported in the provided excerpt. The abstract does not include detailed demographic breakdowns, reasons for low uptake, programmatic or policy factors, vaccine types used, or adverse event data. It also stops mid-sentence in the last line of the abstract, so fuller interpretation, discussion, and specific recommendations from the authors are not available in the source text provided here.
The supplied PubMed abstract truncates at the end and does not present the full discussion, methods appendix, or finer-grained results. Specifically absent from the excerpt are: complete baseline demographic and clinical characteristics, precise dates for cohort entry windows, vaccination types and schedules, absolute counts of vaccinated individuals by subgroup, adjusted hazard ratios and confidence intervals for associations, and the authors’ detailed conclusions or recommendations. These additional data and the full contextual interpretation were not reported in the source material provided.
(End of available information from the provided abstract.)