Demographic characteristics included age, gender, marital
status, education and occupation. Disease-specific characteristics
consisted of diagnosis, heart attack, Canadian
Cardiovascular Society Angina (CCSA) classification, body
mass index (BMI), ejection fraction (EF), percutaneous
transluminal coronary angiography (PTCA), period since diagnosis, number of hospitalisations, hospitalisation,
CAD-specific education, family history, smoking status,
diabetics and comorbidity. The CCSA classification referred
to functional status according to the frequency and intensity
of chest discomfort occurring at the daily activity level
(Karimi et al. 2008). CCSA ranges from Class I–Class IV:
Class I, ordinary physical activity does not cause angina;
Class II, slight limitation of ordinary activity; Class III,
marked limitation of ordinary physical activity; and Class
IV, inability to carry on physical activity. The Charlson
Comorbidity Index (Charlson et al. 1987) was used to measure
comorbidity. It was composed of 19 items, and each
item was assigned to a weight from 1–6. The score was the
sum of the weights for all reported conditions. A higher
score indicates greater disease burden.
Demographic characteristics included age, gender, maritalstatus, education and occupation. Disease-specific characteristicsconsisted of diagnosis, heart attack, CanadianCardiovascular Society Angina (CCSA) classification, bodymass index (BMI), ejection fraction (EF), percutaneoustransluminal coronary angiography (PTCA), period since diagnosis, number of hospitalisations, hospitalisation,CAD-specific education, family history, smoking status,diabetics and comorbidity. The CCSA classification referredto functional status according to the frequency and intensityof chest discomfort occurring at the daily activity level(Karimi et al. 2008). CCSA ranges from Class I–Class IV:Class I, ordinary physical activity does not cause angina;Class II, slight limitation of ordinary activity; Class III,marked limitation of ordinary physical activity; and ClassIV, inability to carry on physical activity. The CharlsonComorbidity Index (Charlson et al. 1987) was used to measurecomorbidity. It was composed of 19 items, and eachitem was assigned to a weight from 1–6. The score was thesum of the weights for all reported conditions. A higherscore indicates greater disease burden.
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