Adiposity and risk of ischaemic and haemorrhagic stroke in 0 ·5 million Chinese men and women: a prospective cohort study

Publication date: June 2018 Source:The Lancet Global Health, Volume 6, Issue 6 Author(s): Zhengming Chen, Andri Iona, Sarah Parish, Yiping Chen, Yu Guo, Fiona Bragg, Ling Yang, Zheng Bian, Michael V Holmes, Sarah Lewington, Ben Lacey, Ruqin Gao, Fang Liu, Zengzhi Zhang, Junshi Chen, Robin G Walters, Rory Collins, Robert Clarke, Richard Peto, Liming Li Background China has high stroke rates despite the population being relatively lean. Uncertainty persists about the relevance of adiposity to risk of stroke types. We aimed to assess the associations of adiposity with incidence of stroke types and effect mediation by blood pressure in Chinese men and women. Methods The China Kadoorie Biobank enrolled 512 891 adults aged 30–79 years from ten areas (five urban and five rural) during 2004–08. During a median 9 years (IQR 8–10) of follow-up, 32 448 strokes (about 90% confirmed by neuroimaging) were recorded among 489 301 participants without previous cardiovascular disease. Cox regression analysis was used to produce adjusted hazard ratios (HRs) for ischaemic stroke (n=25 210) and intracerebral haemorrhage (n=5380) associated with adiposity. Findings Mean baseline body-mass index (BMI) was 23·6 kg/m2 (SD 3·2), and 331 723 (67·8%) participants had a BMI of less than 25 kg/m2. Throughout the range examined (mean 17·1 kg/m2 [SD 0·9] to 31·7 kg/m2 [2·0]), each 5 kg/m2 higher BMI was associated with 8·3 mm Hg (SE 0·04) higher systolic bloo...
Source: The Lancet Global Health - Category: International Medicine & Public Health Source Type: research