Moreover, by using a standardized report form, demographic (e.g. age, gender, province of residence), clinical (e.g. symptoms, clinical form of disease, existence of underlying conditions, patient outcome) and microbiological (type and number of the positive biological samples) data are routinely collected.
We conducted telephone interviews by using a standard questionnaire to assess demographic information, travel history, risk factors for infection, underlying medical conditions, and clinical symptoms.
16 The potential predictors of health-related knowledge were collected by using a self-administrated questionnaire, including demographic factors (age and gender), place of origin (urban or rural), major (Medicine, Agriculture, Art, Science), year of class (1st, 2nd, 3rd) and parental education (middle school or below, high school, college or above).
dadi infers demographic parameters by using a diffusion approach to fit the site-frequency spectrum of the observed data to a demographic model.
Data were collected using a demographics questionnaire developed by the investigator and the Safe Sex Behavior Questionnaire (SSBQ).
We calculated incidence risk ratios for demographic characteristics by using a negative binomial regression (Technical Appendix).
Data were collected by using a self administered questionnaire which included demographic characteristics and Champion's Health Belief Model Scale.
Further objectives are to study the generalizability of the results for areas with a different socio-demographic structure, to identify effects of calibration weightings, and to study the change of response rates for different socio-demographic groups by using a follow-up.
We assessed the socioeconomic and demographic characteristics of participants by using a questionnaire.
