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. Author manuscript; available in PMC: 2019 Jun 25.
Published in final edited form as: J Hum Hypertens. 2018 Nov 12;33(3):229–236. doi: 10.1038/s41371-018-0129-z

Table 4.

VIM values of BP stratified by country: INTERMAP, 1996–1999

Number Japan PRC UK US
1145 839 497 2195
VIM of average SBP of 1st and 2nd measurement across 4study visits 5.44 ± 2.88b 6.85 ± 3.49a,c 5.65 ± 2.81b 5.84 ± 3.01b
VIM of 1st SBP measurement across 4 study visits 6.14 ± 3.15b 7.20 ± 3.62a,c 6.10 ± 2.97b 6.39 ± 3.22b,c
VIM of 2nd SBP measurement across 4 study visits 5.89 ± 3.02b 7.02 ± 3.51a,c 5.92 ± 3.01b 6.22 ± 3.16b
VIM of SBP of all measurement (8 times) 5.92 ± 2.53b,c 6.76 ± 3.13a,c 5.82 ± 2.53a,b 6.14 ± 2.67b,c,

Values are number or mean ± SD

ANCOAVA was used to tests for differences of VIMs of BP among countries

Adjusted for age, sex, study centers, pulse, outside temperature, urinary potassium excretion, urinary sodium excretion, past history of CVD and antihypertensive medication drug class

a

Significantly different from Japan (Followed by Bonferroni post hoc testing)

b

Significantly different from PRC (Followed by Bonferroni post hoc testing)

c

Significantly different from UK (Followed by Bonferroni post hoc testing)

BP blood pressure, VIM variation independent of mean, SBP systolic blood pressure, PRC People’s Republic of China, UK United Kingdom, US United States, SD standard deviation, ANCOVA analysis of covariance