title: Distribution and determinants of the difference between diastolic phase 4 and phase 5 blood pressure.
abstract: Auscultatory blood pressure measurements from 18 325 male British civil servants were used to examine the relationship between diastolic phase 4 (D4) and phase 5 (D5). The two measures are highly correlated (r = 0.98) and this is unaffected by age. The distribution of the difference between the two indices is skewed with a median difference of 1 mmHg. Phase 4 and D5 were recorded at the same level in 31% of subjects. The difference was 5 mmHg or more in 9% of subjects, and 10 mmHg or more in 1%. The difference between the two diastolic indices depends partly on the level of blood pressure and body mass index.
mesh_terms: D000328:Adult; D000367:Age Factors; D000704:Analysis of Variance; D001794:Blood Pressure; D001795:Blood Pressure Determination / Q000379:methods*; D003971:Diastole; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D012907:Smoking