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Bragg F, Halsey J, Guo Y, Zhang H, Yang L, Sun X, Pei P, Chen Y, Du H, Yu C, Clarke R, Lv J, Chen J, Li L, Chen Z. Blood pressure and cardiovascular diseases in Chinese adults with type 2 diabetes: A prospective cohort study. Lancet Reg Health West Pac 2021; 7:100085. [PMID: 34327415 PMCID: PMC8315364 DOI: 10.1016/j.lanwpc.2020.100085] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 12/04/2020] [Accepted: 12/15/2020] [Indexed: 01/30/2023]
Abstract
BACKGROUND Controversy persists about the relationship of blood pressure with cardiovascular diseases (CVD) in diabetes and associated disease burden. We assessed these associations among Chinese adults with type 2 diabetes (T2D). METHODS In 2004-08, the China Kadoorie Biobank recruited >512,000 adults aged 30-79 years from 10 localities across China, including 26,315 with T2D (based on self-report or plasma glucose measurement) but no prior CVD, followed-up for ~9 years. Cox regression yielded adjusted HR for major CVD and all-cause mortality associated with 10 mmHg higher usual (longer-term average) SBP. Attributable fractions were estimated to assess cardiovascular mortality burden due to uncontrolled hypertension (SBP ≥130 mmHg or DBP ≥80 mmHg). FINDINGS Overall, 75.7% of participants had self-reported (24.8%) or screen-detected (50.9%) (SBP ≥130 mmHg or DBP ≥80 mmHg) hypertension. Among individuals with self-reported hypertension, 82.3% were treated, of whom 9.3% achieved control. There were positive log-linear associations of blood pressure with CVD, with no evidence of a threshold down to ~120 mmHg for usual SBP. Each 10 mmHg higher usual SBP was associated with HR of 1.28 (95% CI 1.25-1.30), 1.18 (1.15-1.21), 1.17 (1.15-1.19) and 1.45 (1.38-1.52) for cardiovascular death (n=1807), major coronary event (n=1190), ischaemic stroke (n=4362) and intracerebral haemorrhage (n=469), respectively. There was an apparent J-shaped association with all-cause mortality (n=4503). In this diabetes population, uncontrolled hypertension accounted for 39% of cardiovascular deaths. INTERPRETATION Uncontrolled hypertension is common in Chinese adults with T2D, resulting in substantial excess risks of CVD. Improved hypertension management could avoid a large number of cardiovascular-related deaths. FUNDING Kadoorie Foundation, Wellcome Trust, MRC, BHF, CR-UK, MoST, NNSF.
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Affiliation(s)
- Fiona Bragg
- Clinical Trial Service Unit & Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Old Road Campus, Oxford OX3 7LF, UK
- Medical Research Council Population Health Research Unit at the University of Oxford, Oxford, UK
| | - Jim Halsey
- Clinical Trial Service Unit & Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Old Road Campus, Oxford OX3 7LF, UK
- Medical Research Council Population Health Research Unit at the University of Oxford, Oxford, UK
| | - Yu Guo
- Chinese Academy of Medical Sciences, Beijing 102308, China
| | - Hua Zhang
- Qingdao Center for Disease Control and Prevention, 175 Shandong Road, Qingdao 266033, China
| | - Ling Yang
- Clinical Trial Service Unit & Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Old Road Campus, Oxford OX3 7LF, UK
- Medical Research Council Population Health Research Unit at the University of Oxford, Oxford, UK
| | - Xiaohui Sun
- Qingdao Center for Disease Control and Prevention, 175 Shandong Road, Qingdao 266033, China
| | - Pei Pei
- Chinese Academy of Medical Sciences, Beijing 102308, China
| | - Yiping Chen
- Clinical Trial Service Unit & Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Old Road Campus, Oxford OX3 7LF, UK
- Medical Research Council Population Health Research Unit at the University of Oxford, Oxford, UK
| | - Huaidong Du
- Clinical Trial Service Unit & Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Old Road Campus, Oxford OX3 7LF, UK
- Medical Research Council Population Health Research Unit at the University of Oxford, Oxford, UK
| | - Canqing Yu
- School of Public Health, Peking University Health Science Center, Beijing, China
| | - Robert Clarke
- Clinical Trial Service Unit & Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Old Road Campus, Oxford OX3 7LF, UK
| | - Jun Lv
- School of Public Health, Peking University Health Science Center, Beijing, China
| | - Junshi Chen
- China National Center For Food Safety Risk Assessment, Beijing 100022, China
| | - Liming Li
- School of Public Health, Peking University Health Science Center, Beijing, China
| | - Zhengming Chen
- Clinical Trial Service Unit & Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Old Road Campus, Oxford OX3 7LF, UK
- Medical Research Council Population Health Research Unit at the University of Oxford, Oxford, UK
| | - for the China Kadoorie Biobank (CKB) collaborative group (members listed in Supplementary appendix)
- Clinical Trial Service Unit & Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Old Road Campus, Oxford OX3 7LF, UK
- Medical Research Council Population Health Research Unit at the University of Oxford, Oxford, UK
- Chinese Academy of Medical Sciences, Beijing 102308, China
- Qingdao Center for Disease Control and Prevention, 175 Shandong Road, Qingdao 266033, China
- School of Public Health, Peking University Health Science Center, Beijing, China
- China National Center For Food Safety Risk Assessment, Beijing 100022, China
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