44 (2) PP concentrations’tend to increase with age (Taylor et al. and Floyd et al.).5 3) PP concentrations vary within the same individual from day to day.s (4) PP concentrations fluctuate, sometimes widely, within an observation period of 1½h.8
Consequently, a single sample from a patient does not give much information and the reference interval for subjects above the age of 35 is unrewardingly broad. However, in the individual patient PP concentrations fluctuate in parallel with fluctuations in spontaneous acid sec-
(rs=0.431±0.083; positive correlation: P
Consequently, a single sample from a patient does not give much information and the reference interval for subjects above the age of 35 is unrewardingly broad. However, in the individual patient PP concentrations fluctuate in parallel with fluctuations in spontaneous acid sec-
(rs=0.431±0.083; positive correlation: P
