Fig. 2

Comparison of mean systolic and diastolic blood pressures by age category. Footnote: Error bars represent systolic BP (red) and diastolic BP (black). Mean SBP in age categories: < 20 (118.8 ± 12.9), 20–39 (122.5 ± 15.3), 40–59 (132.3 ± 20.2) and ≥ 60 (143.1 ± 22.8). Mean DBP in age categories: < 20 (72.5 ± 10.3), 20–39 (77.7 ± 11.8), 40–59 (85.4 ± 13.5) and ≥ 60 (88.0 ± 14.1). Total numbers in each age category are shown in Table 1. ANOVA for between group comparisons; p = 0.000 for both SBP and DBP