Table II.

Peak Expiratory Flows and Fitted Correlation Exponents (α) of Occupational Asthmatic Subjects in Three Occupational Scenarios

Scenario	PEF (L min−1)	PEF (% Predicted)	COVc (%)	Skewness	α
I	506.4 ± 26.1a	80.6%b	5.2	0.68	0.53
II	421.9 ± 59.9	67.1%	14.2	−0.23	0.78
III	357.7 ± 56.9	56.9%	15.9	0.89	0.87

^aMean ± standard deviation.

^bAdopted from Nunn and Gregg^{( 11 )} in that predicted PEF for men: log_e PEF (L min⁻¹) = 0.544 log_e age − 0.0151age − 74.7/height (cm) + 5.48. An aged 40 years old with a height of 170 cm male was estimated to be 628.5 L min⁻¹ of predicted PEF.

^cCoefficient of variation (COV) = standard deviation/mean.