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. 2012 Aug 8;2(4):e001062. doi: 10.1136/bmjopen-2012-001062

Table 5.

Cardiovascular risk distribution among the 9926 adult subjects investigated in the Hypertension and Diabetes in Yemen study based on the results first visit (visit 1), or both visits

After visit 1 After two visits Δ
Risk categories n= Crude (%) Age weighted, % (95% Cl) n Crude Age weighted, % (95% Cl) n
Average 2246 22.6 30.3 (28.9 to 31.6) 2326 23.4 31.3 (29.9 to 32.7) 128 851
Low 3387 34.1 33.7 (32.4 to 35.0) 3495 35.2 34.1 (32.8 to 35.4) 48 207
Moderate 2234 22.5 20.3 (19.3 to 21.3) 2281 23.0 20.7 (19.7 to 21.7) 52 613
High 1206 12.1 8.2 (7.7 to 8.7) 1033 10.4 6.6 (6.1 to 7.1) −190 741
Very high 853 8.6 7.5 (6.9 to 8.1) 792 8.0 7.2 (6.6 to 7.8) −36 523

Δ=estimated difference between Yemen subjects attributed to the risk category on the basis of blood pressure (BP) measurements taken at the first visit and those attributed to the same class on the basis of average of BP measurements taken at both visits (subjects allocated at visit 1−subjects allocated after two visits).