Hypertension diabetes and ischemic heart
Specially trained laboratory technicians followed standard guidelines and instructions to perform spirometries using Decitabine Vitalograph spirometer (Vitalograph Ltd., Buckingham, England). Technicians presented the test procedure individually to each subject. After the subject learned the correct technique and repeated it, spirometric tests were aimed at producing at least two curves as similar as possible to one another. To obtain the appropriate forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC) values, technicians instructed subjects to inhale and fill their lungs with air, and, then, to exhale as forcefully and completely as possible. Technicians encouraged subjects to continue expiration for as long as possible (until the needle stopped moving higher). The FEV1/FVC quotient was calculated using the highest readings for FEV1 and FVC from the technically acceptable efforts recorded for the body temperature and pressure, saturated with water vapour (BTPS) values  and . Individual results were calculated on the basis of the SAPALDIA reference values for the corresponding age, sex, and height of the subject .