“…However, in the US, only 13.3% and 28.7% of GP's were very familiar with the ATS/ERS guidelines or the GOLD document, respectively [25]. In Italy, almost a quarter of the 1864 GPs that participated in a national survey declared not to use any guideline in their clinical practice [26]. In a previous smaller study in Spain, adherence to treatment recommendations was assessed in 1365 COPD patients in primary care, and only 18% of the patients were treated according to guidelines, with the cost per patient per year being higher in the non adherence group, particularly in moderate patients who represent the majority of patients attended in primary care [27].…”