“…The meta-analysis of series of randomized studies established that the prevalence of chronic obstructive pulmonary disease in the world and Europe is on average 7,2 %, that is near four million and hundred people suffer from this disease, in city dwellers the prevalence of chronic obstructive pulmonary disease reaches 10,2 %, among men -9,8 % and women -5,6 % respectively, among patients, older than 40 years -10 %, older than 65 years -14,2 %, among smokers -15,4 %, among persons, who never smoked -4,3 %, among persons, who left smoking -10,7 % [4,6,7].…”