Table 2.

Model fits for illuminance-induced suppression of plasma melatonin

ModelFormulaParameter EstimatesAdjusted R2AICRSE
LogEmbedded ImageEmbedded Image0.535.800.0500
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3-Parameter logisticEmbedded ImageEmbedded Image0.587.570.0448
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4-Parameter logisticEmbedded ImageEmbedded Image0.579.560.0459
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PowerEmbedded ImageEmbedded Image0.515.890.0526
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Cube rootEmbedded ImageEmbedded Image0.0465.780.102
  • Model fits to acute suppression of plasma melatonin during hours 2–5 after the presumptive midpoint of the peak of melatonin during the 1st experimental light exposure. See materials and methods for description of the models and statistics. Parameters are shown with the SD of the fit.