The purpose of this study is: * to find out out the number of children who develop crohn's disease (CD) and ulcerative colitis (UC) each year and are living with the disease and to see how this differs by age groups. * to understand how children of different age groups are treated over time and how their treatment changes as they grow. * to assess how often children use healthcare services and how much this costs for different age groups over several years. CD and UC are long-term diseases that cause inflammation in intestine (part of digestive system) and develop ulcers.
Study Type
OBSERVATIONAL
Enrollment
8,000
Sungkyunkwan University Research and Business Foundation
Suwon, South Korea
RECRUITINGCrude and Age-Adjusted Annual Incidence in Pediatric Crohn's Disease (CD)
The crude and age-adjusted annual incidence CD will be calculated in each calendar year. Annual incidence and the prevalence in the year of interest will be estimated using the number of newly diagnosed participants and the number of participants with the diagnosis within the corresponding year, respectively.
Time frame: During the index period (2012 to 2023; up to 12 years)
Crude and Age-Adjusted Annual Incidence in Pediatric Ulcerative Colitis (UC)
The crude and age-adjusted annual incidence UC will be calculated in each calendar year. Annual incidence and the prevalence in the year of interest will be estimated using the number of newly diagnosed participants and the number of participants with the diagnosis within the corresponding year, respectively.
Time frame: During the index period (2012 to 2023; up to 12 years)
Crude and Age-Adjusted Annual Prevalence in Pediatric CD
The crude and age-adjusted annual prevalence CD will be calculated in each calendar year. Annual incidence and the prevalence in the year of interest will be estimated using the number of newly diagnosed participants and the number of participants with the diagnosis within the corresponding year, respectively.
Time frame: During the index period (2012 to 2023; up to 12 years)
Crude and Age-Adjusted Annual Prevalence in Pediatric UC
The crude and age-adjusted annual prevalence UC will be calculated in each calendar year. Annual incidence and the prevalence in the year of interest will be estimated using the number of newly diagnosed participants and the number of participants with the diagnosis within the corresponding year, respectively.
Time frame: During the index period (2012 to 2023; up to 12 years)
Incidence of CD by Age-Stratified Groups
Incidence of CD stratified by age-specific subgroups (0 to less than \[\<\] 6 years old, 6 to \<10 years old, and 10 to \<18 years old) will be reported.
Time frame: During the index period (2012 to 2023; up to 12 years)
Incidence of UC by Age-Stratified Groups
Incidence of UC stratified by age-specific subgroups (0 to \<6 years old, 6 to \<10 years old, and 10 to \<18 years old) will be reported.
Time frame: During the index period (2012 to 2023; up to 12 years)
Prevalence of CD by Age-Stratified Groups
Prevalence of CD stratified by age-specific subgroups (0 to \<6 years old, 6 to \<10 years old, and 10 to \<18 years old) will be reported.
Time frame: During the index period (2012 to 2023; up to 12 years)
Prevalence of UC by Age-Stratified Groups
Prevalence of UC stratified by age-specific subgroups (0 to \<6 years old, 6 to \<10 years old, and 10 to \<18 years old) will be reported.
Time frame: During the index period (2012 to 2023; up to 12 years)
Percentage of Participants Whose Primary Diagnosis Switched Between CD and UC
Percentage of participants whose primary diagnosis switched at least once between CD and UC during the follow-up period will be reported.
Time frame: During the index period (2012 to 2023; up to 12 years)
Initial Treatment Types by Age-Stratified Group
Initial treatment types by age-stratified groups (0 to \<6 years old, 6 to \<10 years old, and 10 to \<18 years old on the index date) will be reported.
Time frame: From index date to follow-up (Up to 13 years)
Subsequent Treatment Sequences by Age-Stratified Group
Subsequent treatment sequences by age-stratified groups (0 to \<6 years old, 6 to \<10 years old, and 10 to \<18 years old on the index date) will be reported.
Time frame: From index date to follow-up (Up to 13 years)
Cumulative Persistence Rates for Biologic Drugs
Cumulative persistence rates for biologic drugs is defined as continuous use of the same biologic drug without a pre-defined biologic free interval (that is, 90 days or more) between prescription claims.
Time frame: From index date to follow-up (Up to 13 years)
Time to Discontinuation
Discontinuation (non-persistence) will be defined as experiencing one of the following cases: stop: a case where biologic drug was prescribed with a gap of greater than or equal to (\>=) 90 days from the discontinuation date of the previous prescription OR no further biologic drug was prescribed until the end of study period from the discontinuation date of the index drug; switch: a case where a different biologic drug was prescribed after the initial drug; re-initiation: a case where the same biologic drug was prescribed again after \>=90 days.
Time frame: From index date to follow-up (Up to 13 years)
Number of Hospitalizations
Number of hospitalizations both overall and by age groups will be reported.
Time frame: From index date to follow-up (Up to 13 years)
Length of Hospitalization
Length of hospitalization both overall and by age groups will be reported.
Time frame: From index date to follow-up (Up to 13 years)
Number of Emergency Department (ED) Visit
Number of ED visits both overall and by age groups will be reported.
Time frame: From index date to follow-up (Up to 13 years)
Number of Outpatient Visits
Number of outpatient visits both overall and by age groups will be reported.
Time frame: From index date to follow-up (Up to 13 years)
Number of Inflammatory Bowel Disease (IBD) Related Surgeries
Number of IBD related surgeries both overall and by age groups will be reported.
Time frame: From index date to follow-up (Up to 13 years)
Number of Inpatient and Outpatient Visits to Non-Gastroenterology (GI) Departments
Number of inpatient and outpatient visits to non-GI departments both overall and by age groups will be reported.
Time frame: From index date to follow-up (Up to 13 years)
Medical Costs
Medical costs including inpatient, outpatient and pharmacy costs, both overall and by age groups, will be reported.
Time frame: From index date to follow-up (Up to 13 years)
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