Table 3.
Incidence Rate Ratios Comparing Rotavirus and Diarrhea Incidence Pre– (January 2010–June 2014) and Post–Vaccine (July 2014–June 2017) Introduction in a Vaccine Impact Study in Kenya, 2010–2017
| Rotavirus | All-cause Diarrhea | |||||
|---|---|---|---|---|---|---|
| Post–Vaccine Period | IRR | 95% CI | P value | IRR | 95% CI | P value |
| Kilifi | ||||||
| July 2014–June 2015 | 0.43 | .20–.92 | .031 | 0.59 | .41–.84 | .003 |
| July 2015–June 2016 | 0.20 | .07–.54 | .002 | 0.52 | .45–.60 | <.001 |
| July 2016–June 2017 | 0.24 | .13–.44 | <.001 | 0.54 | .45–.66 | <.001 |
| Siaya | ||||||
| July 2014–June 2015 | 0.41 | .21–.80 | .009 | 0.59 | .48–.73 | <.001 |
| July 2015–June 2016 | 0.18 | 0.08–0.39 | <.001 | 0.40 | .28–.57 | <.001 |
| July 2016–June 2017 | 0.19 | .04–.93 | .040 | 0.38 | .23–.62 | <.001 |
See the Methods section for statistical details.Abbreviations: CI, confidence interval; IRR, incidence rate ratio.