Table 1:

Model fit and detection of diurnal variation in circadian phase markers

	Percentage of Patients with Improved Model Fit for Gamma Distribution			Percentage of Patients with Diurnal Variation Meeting Significance Criteria
Sample	AIC	AICC	BIC	GLM: Normal Distribution	GZLM: Gamma Distribution
Number of Patients	AIC	AICC	BIC	GLM: Normal Distribution	GZLM: Gamma Distribution
Heart rate every 5 sec	70%	70%	70%	100%	100%
N=56	70%	70%	70%	100%	100%
Heart rate Hourly	63%	63%	63%	89%	91%
N=56	63%	63%	63%	89%	91%
Actigraphy every 30 sec	100%	100%	100%	94%	100%
N=32	100%	100%	100%	94%	100%
Actigraphy, Hourly	78%	78%	78%	44%	47%
N=32	78%	78%	78%	44%	47%
Urinary aMT6s	78%	78%	78%	83%	89%
N=18	78%	78%	78%	83%	89%

Abbreviations: AIC, Akaike Information Criteria without correction for small sample sizes; AICC, Akaike Information Criteria with correction for small sample sizes aMT6s, 6-sulfatoxymelatonin; BIC, Bayesian Information Criteria; sec, seconds; GLM, general linear model with normal distribution; GZLM, generalized linear model with gamma distribution.