Study of a Functional Polymorphism in the PER3 Gene and Diurnal Preference in a Colombian Sample

Table 1: Association of the PER3-VNTR with (A) Scores of the Composite Scale of Morningness (CSM) and its categorization in morning/neutral/evening chronotypes and (B) Scores of the Epworth Sleep Scale (ESS) and its categorization in High/ Low somnolence.

PER3-VNTR		Chronotypes			p value	Composite Scale of Morningness Scores Mean (SE)	p value
PER3-VNTR		Morning Type n (%)	Neutral Type n (%)	Evening Type n (%)	p value	Composite Scale of Morningness Scores Mean (SE)	p value
Genotypes	4/4	41 (60.3)	108 (65.9)	43 (69.4)	0.58c	39.55 (0.38)	0.37a
	4/5	25 (36.8)	48 (29.3)	15 (24.2)		40.48 (0.63)
	5/5	2 (2.9)	8 (4.9)	4 (6.5)		38.79 (1.56)
	Total	68 (100)	164 (100)	62 (100)		39.74 (0.32)
Alleles	4	0.81	0.80	0.79	0.58c
Alleles	5	0.19	0.20	0.21	0.58c