*Biological Determinants of Sleep Disorders DOI: http://dx.doi.org/10.5772/intechopen.101765*


### **Table 7.**

*Frequencies of VNTR genotypes and alleles of the* DAT *gene polymorphism in the population and their association with sleep disorders (screening III).*

(95% CI 1672–69,537) is much more common. On the contrary, among carriers of the heterozygous A/G genotype of the *TNF-α* gene, in comparison with carriers of all other genotypes, sleep was more often satisfactory (30%) than good (15.2%) χ<sup>2</sup> = 6756 df = 1 p = 0.009. A comparative analysis between the carriers of different genotypes of *TNF-α* helped to reveal that the carriers of the genotype G/G reported good sleep (84.6%) rather than satisfactory (69.2%), more often, whereas in carriers of genotype A/G, on the contrary, satisfactory sleep (30.8%), rather than good sleep (15.4%) χ<sup>2</sup> = 7013 df = 1 p = 0,008; OR = 2434 (95%CI 1247–4751) prevails. Comparative analysis of carriers of the G and A alleles of the *TNF-α* gene among men with different self-assessment of sleep did not show significant differences.
