Volume 30, Number 11—November 2024
Research
Spatiotemporal Ecologic Analysis of COVID-19 Vaccination Coverage and Outcomes, Oklahoma, USA, February 2020–December 2021
Kai Ding
, Ozair H. Naqvi, R. Jackson Seeberger, Dale W. Bratzler, and Aaron M. Wendelboe
, Ozair H. Naqvi, R. Jackson Seeberger, Dale W. Bratzler, and Aaron M. Wendelboe
Table 2
Association between population percentage of complete vaccination series and increases in cumulative death rates and cumulative hospitalization rates, respectively, for selected time intervals in analysis of COVID-19 vaccination coverage and outcomes, Oklahoma, USA, February 2020–December 2021*
| Time interval | Death |
Hospitalization |
|||
|---|---|---|---|---|---|
| Relative decrease for 1 percentage point increase in vaccination (95% CI) | p value | Relative decrease for 1 percentage point increase in vaccination (95% CI) | p value | ||
| Jan–Mar 2021 | –4.4% (–10.5% to 1.4%) | 0.130 | –7.4% (–11.0% to –3.8%) | <0.0001 | |
| Apr–Jun 2021 | 6.3% (1.4%–10.9%) | 0.014 | 1.1% (–0.7%–2.8%) | 0.231 | |
| Jul–Dec 2021 | 1.9% (1.1%–2.6%) | <0.0001 | 1.1% (0.5%–1.7%) | 0.001 | |
*Monthly data were modeled with (log-link) quasi-Poisson regression using the GAM function in R package “MGCV.” All models adjusted for averaged cumulative case rate as potential confounder. †Sensitivity analysis showed similar results when December 2021 data were excluded or using cumulative vaccination rate on the first day of each month
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