Is xanthine oxidase activity influenced by environmental factors in Ethiopians?
The XO activity is polymorphic in Ethiopians. Neither gender nor smoking-related differences influenced XO activity but the difference in activity between Ethiopians living in Sweden or in Ethiopia indicates influence of other environmental factors such as dietary habits on XO activity.
The age-specific PSA levels among Nigerian men for each age group is higher than what was described for men in the Western world. These reference ranges of serum PSA should be considered for men aged ≥40 years in our environment.