A Lifecourse Map of Diseases in China

Study Overview
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Brief Summary
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The purpose of this study is to form a chronological map of common diseases and rare diseases in Chinese population by determining the prevalence of different diseases in each age group.

Detailed Description
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Studying the distribution of various diseases in specific populations can help explore the causes of diseases, elucidate the distribution patterns, and develop preventive and control measures. Based on an overall assessment of prevalence, the combination of relevant results with age at diagnosis for multiple diseases is important for further understanding of the distribution of diseases at the population level. Therefore, this study aims to form a chronological map of common diseases and rare diseases in Chinese population by determining the prevalence of different diseases in each age group, thus providing a reference for more effective prevention, diagnosis and treatment of diseases.

Official Title
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A Lifecourse Map of Common Diseases and Rare Diseases in China

Conditions
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Common Diseases, Rare Diseases

Intervention / Treatment
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* Other: Data analysis


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: All inpatients within the period of January 1, 2017 to December 31, 2021. Patients with discharge diagnosis. Patients with accurate gender and age records. Exclusion Criteria: Morbidity and mortality due to external causes, i.e. injuries, poisonings and other adverse events due to external environment and accidents. Pregnancy-related conditions. Symptoms, signs, abnormal clinical and laboratory findings. Traditional Chinese Medicine diagnosis records. Patients with incorrect or missing disease codes.
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Hospitalized patients<br>The diseases were included based on the results of the preliminary data exploration and standardization according to ICD-10. | Other: Data analysis<br>* Data analysis is based on a single database from the National Health Medical Data (North Center).<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| age-specific prevalence rate | Age-specific prevalence rate stratified by sex were calculated by dividing the number of incident cases with a current disease by the total number of people in the study population during that time period. | between January 1, 2017 and December 31, 2021 | 
| sex-specific prevalence rate | Sex-specific prevalence rate stratified by age for 10-year bands were calculated by dividing the number of incident cases with a current disease by the total number of people in the study population during that time period. | between January 1, 2017 and December 31, 2021 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| total cost of hospitalization | Total cost of hospitalization and deductibles for the total population and for each age group of diseases are described by mean (SD) values. | between January 1, 2017 and December 31, 2021 |