Individual differences in the diurnal cycle of salivary free cortisol: a replication of flattened cycles for some individuals.

@article{Stone2001IndividualDI,
  title={Individual differences in the diurnal cycle of salivary free cortisol: a replication of flattened cycles for some individuals.},
  author={Arthur A Stone and Joseph E. Schwartz and John Smyth and Clemens Kirschbaum and Sheldon Cohen and Dirk H. Hellhammer and Susan Grossman},
  journal={Psychoneuroendocrinology},
  year={2001},
  volume={26 3},
  pages={295-306}
}
Free cortisol measured in saliva has been shown to have the same diurnal rhythm as serum cortisol, one that typically declines rapidly throughout the waking day. A recent study showed that over 15% of a sample of community individuals who were monitored over two days did not show the typical diurnal rhythm. The present study specifically tested the hypothesis that there is significant between-subject variation (individual differences) in diurnal rhythms using multi-level, random regression… CONTINUE READING