Nationwide Trends in Incidence, Healthcare Utilization, and Mortality in Hospitalized Acute Myocardial Infarction Patients in Taiwan

Nationwide Trends in Incidence, Healthcare Utilization, and Mortality in Hospitalized Acute Myocardial Infarction Patients in Taiwan

This was a retrospective study using the Taiwan's National Health Insurance Research Database (NHIRD). The study employed two study designs for different purposes as follows:

• A cross-sectional analysis was conducted to explore the annual incidence trends.
• A longitudinal cohort study was conducted to assess baseline characteristics, treatment patterns, long-term healthcare utilization, and cause-specific mortality among incident AMI patients.

In each part, the study was conducted for AMI, and separately for ST-segment elevation and non-ST- segment elevation myocardial infarction (STEMI and NSTEMI)

Inclusion Criteria:

Cross-sectional analysis:

• Patients aged 20 years and older.
• Patients who had been admitted for AMI, defined as primary or first secondary diagnosis of AMI between 2014 and 2020.
• The diagnosis of AMI/ STEMI/ NSTEMI was identified by the International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) codes and 10th revision (ICD-10-CM) codes.
• Incident cases of AMI hospitalization were defined as no history of AMI-related hospitalization or outpatient visit within 1 year before admission.

Longitudinal analysis:

Patients aged 20 years and older.

• Patients who had been admitted for AMI, defined as primary or first secondary diagnosis of AMI between 2014 and 2017.
• The diagnosis of AMI/ STEMI/ NSTEMI was identified by ICD-9-CM codes and ICD-10-CM codes. (The ICD-9-CM code and ICD-10-CM codes were the same as above)
• Incident cases of AMI hospitalization were defined as no history of AMI-related hospitalization or outpatient visit within 1 year before admission.
• The cohort entry date was defined as the admission date of incident AMI hospitalization, and the index date was defined as the discharge date of incident hospitalization.

Exclusion Criteria:

None specified