Figure 2: Frequency distribution of hypertension subtypes by age in untreated men with metabolic syndrome (a) and those without metabolic syndrome (b). Numbers at the tops of bars represent the overall percentage distribution of all subtypes of untreated hypertension in the age group. No shading, isolated systolic hypertension (SBP ≥ 140 mmHg and DBP < 90 mmHg); grey shading, isolated diastolic hypertension (SBP < 140 mmHg and DBP ≥ 90 mmHg); black shading, systolic–diastolic hypertension (SBP≥ 140 mmHg and DBP ≥ 90 mmHg).