Table 1

Study characteristics
Study Country Prevalence of prehypertension (%) Sample size (% women) Age (y), average (range or SD) Follow-up (y) Participants with baseline CVD excluded Events for analysis
Wu, 2002*[7] China 35.3 27,739 (46.3) 47.4 (35 to 64) 7 Not report CVD
Asayama, 2004 [18] Japan 46 1,702 (61) 60.6 (10.7) 10.6 Free of stroke Stroke
Liszka, 2005 [8] United States 33 8,986 (54.6) NA (≥25) 18 No CVD, stroke, MI
Lee, 2006 [19] United States 32.6 4,372 (60.6) 56.2(45 to 74) 12 Yes CHD
Qureshi, 2005 [9] United States 41.1 5,181 (55.3) 44.0 (8.6) 31 Yes CAD, stroke, MI
Kshirsagar,2006 [20] United States 37.3 8,960 (55) 53(45 to 64) 11.6 Yes CVD, CHD, stroke
Hsia, 2007 [21] United States 39 60,785 (100) 62.8 (7.0) 7.7 Yes CVD, MI, stroke
Onat, 2008 [22] Turkey 32.8 3,034 (50.4) 48 (12) 6.6 Free of DM and CHD CHD
Kokubo, 2008 [23] Japan 35 5,494 (53) 55 (30 to 79) 11.7 Yes CVD, MI, stroke
Zhang, 2008 [24] United States 32.1 4,507 (60) 56 (45 to 74) 13.4 Free of stroke Stroke
Gu, 2009 [25] China 34.5 158,666 (51) 56 (≥40) 7.7 No CVD, CHD, stroke
Ikeda, 2009 [26] Japan 43 33,372 (65) 54 (40 to 69) 11.0 Yes CHD, stroke
Ishikawa, 2010 [27] Japan 32.3 11,000 (61.3) 55.1 (11.5) 10.7 Yes CVD
Tanaka, 2010 [28] Japan 25.2 22,676 (66) 62 (40 to 80) 2.7 Yes Ischemic stroke
Wu, 2012 [29] China 30.0 100,116 (20.1) 49.4 (30 to 70) 4 Yes CVD, stroke
Hadaegh, 2013 [30] Iran 34.5 6,273(57) 47.1 (≥30) 9.3 Yes CVD, CHD
Sadeghi, 2012[10] Iran 36 3,255 (100) 49.7 (≥35) 6.7 Yes CVD, CHD, stroke
Fukuhara, 2012 [31] Japan 37.7 2,634 (58) 59.1 (≥40) 19 Yes CVD, CHD, Stroke
Erbel, 2012 [11] Germany 26.2 4,181 (53) 59.3 (40 to 75) 7.18 Yes MI,stroke , revascularization

* Article in Chinese; Authors contacted for clarification of data.

CHD Coronary heart disease, CVD Cardiovascular disease, DM Diabetes mellitus, MI Myocardial infarction, NA indicates not available.

Huang et al.

Huang et al. BMC Medicine 2013 11:177   doi:10.1186/1741-7015-11-177

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