Nonclinical elements include patient demographics, hospital identification, admission date, zip code, calendar year, total charges and length of stay.
Data variables in the categories patient demographics, facility identification and timing of transfer and reason and urgency of transfer had strong agreement levels.
Analysis of the association between demographic factors and identification of correct stroke risk factors (defined as identification of 2 or more accurate risk factors) is presented in Table S1 (see additional file 1).
No identification, demographic or medical information was collected on individual patients.
Upon patient identification, demographic and clinical characteristics were entered into an Internet-based data collection form.
The AVisit contains the information about a given patient visit including patient's demographic data, visit identification number, visit date, syndromes, and sub-syndromes.
At the start of the examination, participants were instructed to provide demographic information including: identification number, year of study, age, gender, student origin, highest level of previous qualification, proposed future career and if they were involved in academic tutoring.
As demographic risk factor identification was the main goal of analysis, all demographic factors were kept in the regression model, whilst other patient clinical characteristics (such as PHQ-9 severity, patient-reported past history of depression and patient-reported past history of other mental illness) were entered in the regression model as a second block to allow for separate comparison.
Furthermore, we speculated that the effect of length of residence on the risk of PTD subtypes could be mediated by changes in maternal and fetal morbidity and might be modified by demographic characteristics, enabling identification of subgroups at sustained elevated risk.
