DOI: 10.7910/dvn/5x0mnc
title: Replication Data for: Impact of neighbourhood-level socioeconomic status, traditional coronary risk factors, and ancestry on age at myocardial infarction onset: A population-based register study

description: This dataset contains the data on which the conclusions of the study "Impact of neighbourhood-level socioeconomic status, traditional coronary risk factors, and ancestry on age at myocardial infarction onset: A population-based register study" rely. 

We collected data registered in the Norwegian Myocardial Infarction Register for all patients admitted to Diakonhjemmet Hospital with a non-ST elevation myocardial infarction (NSTEMI) in 2014-2017 (n=840). Using the patients' registered postal codes, we identified in which city district in Oslo, Norway the patients were residing. Patients from districts other than Frogner, Vestre Aker, Ullern, Stovner, Grorud, and Alna were excluded (n=60), and the remaining patients were grouped according to whether they were residing in the western (high neighbourhood-level socioeconomic status (SES)) or north-eastern (low neighbourhood-level SES) city districts. Using the patients' registered social security numbers and the electronic medical record system at Diakonhjemmet Hospital, patients were grouped according to whether or not they had presumed Northwest-European ancestry based on their names and other information found in their medical records. Patients with undecidable ancestry (n=2) were excluded. Furthermore, patients with type 2 myocardial infarction (n=117) were excluded since we aimed to investigate the risk for coronary heart disease (CHD). Re-admissions in the period (n=55) were excluded, and we were left with 606 patients. 

The dataset contains patient data on city district group, presumed ancestry group, age at hospital admission with NSTEMI, history of previous acute myocardial infarction (AMI), prior diagnosis of diabetes, prior diagnosis of hypertension, cigarette smoking status, use of statins, body mass index (BMI), and serum levels of low-density lipoprotein (LDL) cholesterol. Raw data from the Norwegian Myocardial Infarction Register, which was used to generate variables on the patients' presumed ancestry and city-district group, is not made available as it contains personal data, but can be applied for at helsedata.no. Previous AMI was defined regardless of infarction type and ECG diagnosis, prior diagnosis of diabetes was defined as known diagnosis with diabetes mellitus type 1 or 2, prior diagnosis of hypertension was defined as prior or ongoing treatment for hypertension, and cigarette smoking was defined as patients that had been smoking the last month. BMI and LDL cholesterol were measured at hospital admission. 

Registration of all cases of AMI in Norway in the Norwegian Myocardial Infarction Register is mandatory and does not require informed consent. The Norwegian Myocardial Infarction Register is part of the National Register of Cardiovascular Diseases and is authorized in the Section 11 h of the Norwegian Health Register Act. The study was approved by the Institutional Review Board of Diakonhjemmet Hospital and the data privacy representative for Diakonhjemmet Hospital, and all methods were in accordance with the ethical standards of the institution and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.