Comparative characteristics of lifestyle, office and ambulatory blood pressure among students from Tropical Africa, India and Russia

Abstract

Aim. To study the dependence of office and ambulatory blood pressure (BP) level in students with their ethnicity.Material and methods. A total of 110 students were examined as follows: 35 from Russia, 34 from Tropical Africa and 41 from India. Lifestyle was studied using a standardized questionnaire. All students underwent measurement of office blood pressure and 24-hour ambulatory blood pressure monitoring (ABPM) using the BPLabH system (Russia).Results. Students from Russia were more likely to lead a sedentary lifestyle than from Africa (p=0,001) or India (p=0,027). Students from Tropical Africa added salt to food more often than Indians (p=0,03). Office blood pressure measured in the first half of the day was within the normal range for all subjects and did not differ between different ethnic groups. According to ABPM, there were no intergroup differences in systolic blood pressure during the daytime and 24 hours. Diastolic blood pressure of Africans during the daytime (p=0,029) and 24 hours (p=0,002) was higher than in Russians. Nighttime systolic and diastolic blood pressure of African students was significantly higher than in Russian (p=0,006 and p<0,0001, respectively) or Indians (p=0,008 and p=0,006, respectively). Africans showed a smaller blood pressure decrease at night and were more likely to have masked hypertension at night than Russians (p=0,004) or Indians (p=0,046).Conclusion. Office BP did not vary by ethnicity. With ABPM, no differences in blood pressure levels were found between Indian and Russian students. African students had higher blood pressure at night, including masked hypertension, than students from India or Russia.