Table 1 Genotype and allele frequency of the PER3 VNTR in the control, DSWPD and N24SWD groups

From: Lack of association between PER3 variable number tandem repeat and circadian rhythm sleep–wake disorders

Group

N

Genotype [N (%)]

Allele [N (%)]

χ 2

P

  

4/4

4/5

5/5

4

5

  

Control

925

635 (68.65)

260 (28.11)

30 (3.24)

1530 (82.70)

320 (17.30)

3.0608

0.2165

DSWPD

180

115 (63.89)

56 (31.11)

9 (5.00)

286 (79.44)

74 (20.56)

  

N24SWD

68

48 (70.59)

20 (29.41)

0 (0.00)

116 (85.29)

20 (14.71)

  
  1. N number, 4/4 homozygosity for the 4-repeat allele, 4/5 heterozygosity, 5/5 homozygosity for the 5-repeat allele, P P value for the difference in allele frequency among the control, DSWPD, and N24SWD groups
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