Difference in the distribution of onset age of intussusception after rotavirus vaccination and according to the type of rotavirus vaccine: single medical center study

Lee, Yun Young; Lee, Eung Bin; Choi, Kwang Hae

Abstract

BACKGROUND
Rotavirus is the most common cause of severe gastroenteritis in children <5 years of age. The first vaccine, RotaShield was developed, but withdrawn because of its association with increased risk of intussusception. Then, RotaTeq and Rotarix were developed. Although in pre-licensure studies, they were not associated with an increased risk of intussusceptions, in recent studies, it has been controversial. Regarding increased risk of intussusception, we studied the difference in the age of intussusception after rotavirus vaccination.
METHODS
A retrospective analysis was conducted on 136 patients diagnosed with intussusception at Yeungnam University Medical Center for 4 years in the pre-vaccination period (group A) and in the post vaccination period (group B). Sex, mean age and age distribution of intussusceptions were compared according to the type of rotavirus vaccine (group B-1, RotaTeq; group B-2, Rotarix).
RESULTS
The median ages of group A and group B were 18.8+/-19.6 months and 15.5+/-10.2 months, with no significant differences (p=0.23). The median ages of group B-1 and group B-2 were 15.3+/-9.3 months and 15.6+/-10.8 months, with no significant differences (p=0.91). And No significant difference in the distribution of onset age was observed between groups, and only 6 patients were diagnosed with intussusceptions within 1 month after vaccination.
CONCLUSION
No difference was observed in the distribution of onset age of intussusception after rotavirus vaccination and according to the type of rotavirus vaccine. Our study has a limitation in that it was conducted in part of the Daegu area. Additional study is needed.