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Table 1 Variables of the Study

From: Opportunistic detection of atrial fibrillation in subjects aged 65 years or older in primare care: a randomised clinical trial of efficacy. DOFA-AP study protocol

Variables Definition Measure scale
-Study Groups EG: Opportunistic detection of AF Dichotomous Qualitative
CG: regular approach
-Practitioner Physician vs. Nurse Dichotomous Qualitative
Age ≥ 65 years Quantitative Discrete
Sex Man/woman Dichotomous Qualitative
Marital Status bachelor, married, widow/er, divorced Qualitative Polytomous
Residence Urban (≥ 10.000 population)/Rural (<10.000 population) Dichotomous Qualitative
-Clinical and Functional Assessment:  
Symptoms and Signs Asymptomatic, Palpitations, Chest Pain, dispnoea, fatigue, diziness, embolism complications or exacerbation of heart failure, weight loss, diarrhea. Polytomous Qualitative
Conditions (comorbidity) and associated health disorders High blood pressure, heart disease, mitral stenosis, mitral regurgitation, hypertrophic cardiomyopathy, pericarditis,congenital heart disease, previous cardiac surgery, lung diseases (pneumonia, lung cancer, pulmonary embolism, sarcoidosis), alcohol abuse, hyperthyroidism, bone and joint disorders, neurological, hearing, vision, feet, psychic, digestive, urinary, sleep disorders, other. Polytomous Qualitative
To classify chronic disorders we will use the electronic version of the Second International Clasiffication of Primary Care (ICPC-2-E) [31]
Family History of AF Parents, siblings, children Polytomous Qualitative
Drug Consumption for Cardiovascular Disease Name of the drug: The Anatomical Therapeutic Classification (AT) developed by the European Pharmaceutical Market Research Association (EPhMRA) [32] Polytomous Qualitative
Number of Drugs Drugs currently consumed Discrete
Peripheral Blood Pulse Radial pulse measuring according to the protocol: Regular/Irregular Dichotomous Qualitative
Atrial Fibrillation ECG according to the clinical protocol Dichotomous Qualitative
Treatment Pharmacological (Antiarrhythmic / Anticoagulation)/Non-pharmacological (Cardioversion) Polytomous Qualitative