Figure 6. Relation of clearance (CL/F^oral) estimates to age. Individual CL/F^oralestimates (open diamonds; 1/h) increase with age when no correction is made for size. When these estimates are standardized to a 70-kg person using an allometric 3/4 power model (filled squares; 1/h per 70 kg body weight), there is no influence of age on the prediction of CL/F (^oral).