PFT Adjusted Predicted Values for Men MultiCalc

 
Input
 
Height  
Age  
Race Caucasian (1)

Black (0.87)

Asian (0.93)

 
Results
 
 
FEV1  
FVC  
FEV1 FVC Ratio  
 
Decimal Precision  
 
Notes
  • Reviews of predictive formulae show the standard predictive formula produce values slightly below what is observed in healthy men.
  • The 1.08 and 1.1 factors help adjust the discrepency. See the articles below for more information.
  • The residual standard deviation (RSD) for FEV1 is 0.51 litres. For FVC, the RSD is 0.61 litres and for the ratio, the RSD is 7.17% These RSD's are based on the data from the original unadjusted formulae.

 
Equations used
 
FEV1 = Race * 1.08 * ((0.043 * Height) - (0.029 * Age) - 2.49 )
FVC = Race * 1.1 * ((0.0576 * Height) - (0.0269 * Age) - 4.34 )
FEV1FVCRatio = 87.2 - (0.18 * Age)

 
Calculation Details and Variables
  • Equation parameters such as Race, have two or more discrete values that may be used in the calculation. The numbers in the parentheses, e.g. (1), represent the values that will be used.

 
References
  1. Quanjer PhH, Tammeling GJ, Cotes JE, et al. Lung volume and forced ventilatory flows. Report Working Party Standardization of lung function tests. Official Statement European Respiratory Society. Eur Respir J. 1993; 6 Suppl 16: 5-40. PubMed ID: 8499054 PubMed Logo
  2. Falaschetti E, Laiho J, Primatesta P, Purdon S. Prediction equations for normal and low lung function from the Health Survey for England. Eur Respir J. 2004 Mar;23(3):456-63. PubMed ID: 15065839 PubMed Logo

 

 
 
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