highly significantP<0.001
The comparison of the mean spirometric indices of flour mill and controls groups (mean ±SD) indicates FVC, FEV 1 , and PEFR are highly significant (P<0.001) and FEF 25 % −75 % are significant (P<0.01).
The comparison of the mean spirometric indices of flour mill and controls groups (mean ±SD) indicates FVC, FEV 1 , and PEFR are highly significant (P<0.001) and FEF 25 % −75 % are significant (P<0.01).