Skip to main content
. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: J Am Geriatr Soc. 2010 Nov;58(11):2224–2226. doi: 10.1111/j.1532-5415.2010.03128.x

Figure 1.

Figure 1

Expressing the forced expiratory volume in 1-second (FEV1) as percent predicted (%Pred)* or standardized residual (SR)†

1a. Reference values for FEV1, in men of height 1.7 meters (5 feet 7 inches). Subjects A (a 30-year old) and B (a 70-year old) are on the lower 95% confidence limit, corresponding to 74%Pred and 63%Pred, respectively.‡

1b. Plot of the data from Figure 1a, expressed as SR. As can be seen, SR values remain constant, regardless of age.‡

* (measured / predicted) × 100

† (measured − predicted) / (standard deviation of the residuals); see text.

‡ Reproduced with permission from reference 15.