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Calculator: Peak expiratory flow prediction in females (18 to 85 years)


Calculator: Peak expiratory flow prediction in females (18 to 85 years)

 
Input
 
Age  
Height  
Race/ethnicity White

Black or African American

Mexican American

 
Results
 
Important: Inputs must be complete to perform calculation.

 
 
PEF  
PEF LLN  
 

 
 

 
Notes
  • PEF: peak expiratory flow; PEF LLN: PEF lower limit of normal.

 
Equations used
 
PEF = 60 * (b0 + (b1 * Age) + (b2 * sq(Age)) + (b3 * sq(Height)))
PEF_LLN = 60 * (b0 + (b1 * Age) + (b2 * sq(Age)) + (b4 * sq(Height)))

 

 
Calculation details and variables
  • For a White female ≥18 years old: b0 = 0.9267; b1 = 0.06929; b2 = -0.001031; b3 = 0.00018623; b4 = 0.00012148.
  • For a Black or African American female, 18 years old or older: b0 = 1.3597; b1 = 0.03458; b2 = -0.000847; b3 = 0.00019746; b4 = 0.00012160.
  • For a Mexican American female, 18 years old or older: b0 = 0.2401; b1 = 0.06174; b2 = -0.001023; b3 = 0.00022203; b4 = 0.00014611.

 
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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