Document x10raXwGz19O810LkqxBo0v4m

Table 38 The criteria for spirometry In several studies of "normal" subjects 64 Number of individuals tested Age range Number of individuals age 30 Smoking habits Included Min. number of trials Selection process FEV^ Spirometer determination utilized Morris et al 517 (507) 20-84 348 Cherniak & P.nber 870 15-79 336 Knudson et ai 128 25-79 95 Kory ct al 468 18-66 335 lllggens & Keller 1035 20-74 <W60 Ferris ct nl 156 25-74 NA bans 149 21-71+ 125 This study 163 26-70 160 Non-smokers (no cigs > 6mo) Non-smokers Non-smokers Any Any Non-smokers Ex-smokers Non-smokers (<5 pk-yrs) Non-smokers 2 Best effort After 200 ml Stcad-We.ll s 3 Max. values Direct Wed ge 5 Best 2 of 5 Best of any flow Direct Pneumotacliygrapl corrected to Stead-Wells 2 Best effort After 200 ml Collins 2 Best effort Direct Wed ge 5 Best 3 of 5 Direct Collins. 2 Direct Wedge 3 Best effort Extrapo lation Rolling Seal