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Figure 3: Comparative correlation of age and height versus PEF between equations from different studies. The PEF values in the present study were lower than the Nunn and Gregg equation for Europeans and the NHANES III equation for American Caucasians, and the slopes for age and height for different populations was also different

Figure 3: Comparative correlation of age and height versus PEF between equations from different studies. The PEF values in the present study were lower than the Nunn and Gregg equation for Europeans and the NHANES III equation for American Caucasians, and the slopes for age and height for different populations was also different