“…Because of the dif ficulty in precisely defining asthma, true inci dence and prevalence are unknown, but an approximate prevalence of 20% in elderly people has been reported [11], However, Banerjee et al [2] have reported an incidence of asthma of over 40% in an elderly population (age, range 55-91 years) attending day hospi tal or living in welfare homes. These authors recorded FEVi, FVC, and peak expiratory flow rate (PEFR) before and 5 min after inha lation of 200 pg salbutamol.…”