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S15-8
(P)
THE INCIDENCE OF INCARCERATED INGUINAL HERNIA IN CHILDREN AND ITS
ASSOCIATED RISK FACTORS: A NATION-WIDE LONGITUDINAL POPULATION-
BASED STUDY
Shang-Jen CHANG, Yi-Ju CHEN, Stephen Shei-Dei YANG and Chun-Kai HSU
Tzipei buddhist tzu chi hospital, buddhist tzu chi medical foundation, Urology, New Taipei, TAIWAN
PURPOSE
To evaluate the incidence of inguinal hernia and incarcerated hernia in children aged 0 to 15 years and associated risk
factors using a national wide database.
MATERIAL AND METHODS
Children born from 1997 to 2005 were selected from a randomly selected cohort of 1,000,000 from an insured
population of 23 millions. Children with International Classification of Diseases [ICD], 9th revision, code 550 and code of
hernia surgery were regarded as having inguinal hernia. The chi-square test and logistic regression modeling were used
for statistical analyses.
RESULTS
Totally, 79794 children (41767 boys and 38027 girls) were enrolled in the study period. The cumulative incidence of
inguinal hernia in boys and girls from birth to 15 years old were 6.62% and 0.74%, separately (p<0.01). The peak
incidence of inguinal hernia was 0 year for boys and 5 years for girls, respectively. The ratio of unilateral vs. bilateral
repair was 5.54:1. Girls tended to have more bilateral inguinal hernia than boys (25.4% vs. 12.9%, p<0.01).
Incarcerated hernia occurred in 4.19% children with inguinal hernia without significant gender discrepancy. We did not
find significant correlation between waiting time to hernia repair was not related to incarceration.
CONCLUSIONS
The cumulative incidences of inguinal hernia from birth to age of 15 years old were 6.62% and 1.74% in boys and girls,
respectively. Incarceration occurred in 4.19% of children with inguinal hernia and was not related to waiting for surgery.
The risk factors of girl inguinal hernia require more investigations.