Racial/ethnic variations in the relative telomere length have been clearly described or infrequently studied. The relative telomere length has emerged as a biological aging marker; however, the difference in the telomere length between Sudanese and Chinese individuals is unclear. Objectives: The present study examined the difference in the relative telomere length between Sudanese and Chinese individuals. Methods: The blood samples of Sudanese and Chinese healthy individuals were randomly

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... ted, and their deoxyribonucleic acid was obtained in this study. The relative telomere length was measured by quantitative polymerase chain reaction. The difference in the relative telomere length was analyzed using the Mann-Whitney U test. The degree of distribution in the relative telomere length was assessed using a two-sample Kolmogorov-Smirnov Z test. Results: According to the obtained results, the difference in the relative telomere length between Sudanese and Chinese individuals was statistically significant (P<0.05). The frequency of the relative telomere length distributed in Chinese individuals was statistically higher than that reported for the Sudanese subjects (P<0.05). Conclusions: A great difference was observed in the relative telomere length between Sudanese and Chinese populations indicating the difference between Sudanese and Chinese races.