Table 1. Hospitalization data for rotavirus gastroenteritis in Tsu City.
| - | Pre-vaccine years | Post-vaccine years | ||||||
|---|---|---|---|---|---|---|---|---|
| 2007–2008 | 2008–2009 | 2009–2010 | 2010–2011 | 2011–2012 | 2012–2013 | 2013–2014 | 2014–2015 | |
| No. of hospitalizations | 68 | 53 | 38 | 46 | 35 | 41 | 9 | 7 |
| Tsu City population (< 5 years old) | 12 270 | 12 339 | 12 279 | 11 755 | 11 775 | 11 794 | 11 687 | 11 598 |
| Hospitalization rate (per 1 000 person-years) |
5.5 | 4.3 | 3.1 | 3.9 | 3.0 | 3.5 | 0.8* | 0.6* |
| 95% confidence interval | 4.4–7.0 | 3.3–5.6 | 2.3–4.2 | 2.9–5.2 | 2.1–4.1 | 2.6–4.7 | 0.4–1.5 | 0.3–1.2 |
* Statistically significant decrease compared to the average hospitalization rate before introduction of rotavirus vaccine (2007–2011).