Title |
Chronic kidney disease among overweight and obesity with and without metabolic syndrome in an urban Chinese cohort
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Published in |
BMC Nephrology, June 2015
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DOI | 10.1186/s12882-015-0083-8 |
Pubmed ID | |
Authors |
Xia Cao, Jiansong Zhou, Hong Yuan, Liuxin Wu, Zhiheng Chen |
Abstract |
It is widely accepted that metabolic syndrome is associated with an increased risk of chronic kidney disease (CKD). To investigate whether coexisting metabolic syndrome is a necessary condition for CKD in overweight and obese. A cohort study of 6852 Chinese individuals from August 2007 to December 2012. Examinations included a questionnaire, physical measurements, and blood sampling. Hazard ratios for incident CKD were estimated according to combinations of BMI category and absence or presence of metabolic syndrome. For CKD, multivariable adjusted hazard ratios vs. normal weight individuals without metabolic syndrome were 1.31 (95 % CI, 0.89-1.92) in overweight and 2.39 (95 % CI, 1.27-4.52) in obese without metabolic syndrome and 1.54 (95 % CI, 1.18-3.95) in normal weight, 2.06 (95 % CI, 1.27-3.36) in overweight, and 2.77 (95 % CI, 1.42-4.31) in obese with metabolic syndrome. There were no interactions between BMI and absence or presence of metabolic syndrome on risk of CKD when BMI was categorized (normal weight, overweight, obese) (P = 0.17). Among individuals both with and without metabolic syndrome there were increasing cumulative incidences of CKD from normal weight through overweight to obese individuals (log-rank trend P = 0.04 to P < 0.001). Although the multivariable adjusted hazard ratio for CKD in individuals with vs. without metabolic syndrome was 1.82 (95 % CI, 1.20-2.78) within overweight and obese individuals (log-rank P = 0.005), only 26.1 % of the increased risk observed for BMI is explained by metabolic syndrome. These findings suggest overweight and obesity are risk factors for CKD regardless of the presence or absence of metabolic syndrome. |
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