This study aims to analyse baseline data on IS in order to monitor the possibility of increased risk of IS in children aged \<12 months after introduction of the Rotarix vaccination in Japan.
Study Type
OBSERVATIONAL
Enrollment
54
Data source will be the Japan Medical Data Centre Company Limited (JMDC) - JMDC Medical Data Bank (JMDC-MDB) database. Aggregated data (age in months and years and gender) for all subjects recorded in the database and subject-level data for IS cases will be extracted from the database. This database will be reviewed to extract data for the period between January 2005 and April 2011. Cases of IS will be identified using the International Classification of Diseases-10 (ICD-10) diagnostic codes, examination codes and procedural codes.
Occurrence of IS in subjects aged < 12 months
Time frame: Between January 2005 and April 2011 (6 years)
Occurrence of age-specific and gender-specific incidence of IS among subjects aged < 12 months in Japan
Time frame: Between January 2005 and April 2011 (6 years)
Number of IS cases hospitalized more than once among subjects aged < 12 months.
Time frame: Between January 2005 and April 2011 (6 years)
Occurrence of IS cases by calendar months and year among subjects aged < 12 months
Time frame: Between January 2005 and April 2011 (6 years)
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