PMID- 29391834 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220311 IS - 1179-1349 (Print) IS - 1179-1349 (Electronic) IS - 1179-1349 (Linking) VI - 10 DP - 2018 TI - Independent and combined effect of bilirubin and smoking on the progression of chronic kidney disease. PG - 121-132 LID - 10.2147/CLEP.S150687 [doi] AB - OBJECTIVE: Whether serum bilirubin and cigarette smoking affect the risk of renal function decline remains inconclusive. We aimed to test the independent and combined effects of bilirubin and cigarette smoking on the progression of chronic kidney disease (CKD) in hypertensive adults. METHODS: The study population consisted of 12,633 patients in the renal sub-study of the China Stroke Primary Prevention Trial. The primary outcome was progression of CKD, defined as a decrease in estimated glomerular filtration rate (eGFR) of >/=30% and to a level of <60 mL/min/1.73 m(2) if baseline eGFR was >/=60 mL/min/1.73 m(2), or a decrease in eGFR of >/=50% if baseline eGFR was <60 mL/min/1.73 m(2), or end-stage renal disease. The secondary outcomes included 1) rapid decline in renal function and 2) annual rate of eGFR decline. RESULTS: The median follow-up duration was 4.4 years. Cigarette smoking had no significant effect on the progression of CKD (odds ratio [OR]: 1.11, 95% confidence interval [95% CI]: 0.78-1.57). However, a significantly lower risk of the primary event (OR: 0.72, 95% CI: 0.55-0.95) was found in participants in tertile 3 compared to those in tertiles 1-2 for total bilirubin (TBiL) levels. More importantly, there was an interaction between TBiL and smoking status on the primary outcome (P for interaction =0.013). Among ever smokers, TBiL levels had no significant effect on the primary outcome. However, among never smokers, higher TBiL levels were significantly associated with a lower risk of the primary outcome (tertile 3 vs 1-2; OR: 0.53, 95% CI: 0.36-0.78). Similar trends were observed for direct bilirubin and secondary outcomes. CONCLUSION: Among hypertensive patients, bilirubin was inversely associated with the progression of CKD in never smokers, but not in ever smokers. FAU - Wang, Jiancheng AU - Wang J AD - National Clinical Research Center for Kidney Disease, State Key Laboratory for Organ Failure Research, Renal Division, Nanfang Hospital, Southern Medical University, Guangzhou. FAU - Wang, Binyan AU - Wang B AD - National Clinical Research Center for Kidney Disease, State Key Laboratory for Organ Failure Research, Renal Division, Nanfang Hospital, Southern Medical University, Guangzhou. AD - Institute for Biomedicine, Anhui Medical University, Hefei. FAU - Liang, Min AU - Liang M AD - National Clinical Research Center for Kidney Disease, State Key Laboratory for Organ Failure Research, Renal Division, Nanfang Hospital, Southern Medical University, Guangzhou. FAU - Wang, Guobao AU - Wang G AD - National Clinical Research Center for Kidney Disease, State Key Laboratory for Organ Failure Research, Renal Division, Nanfang Hospital, Southern Medical University, Guangzhou. FAU - Li, Jianping AU - Li J AD - Department of Cardiology. FAU - Zhang, Yan AU - Zhang Y AD - Department of Cardiology. FAU - Huo, Yong AU - Huo Y AD - Department of Cardiology. FAU - Cui, Yimin AU - Cui Y AD - Department of Pharmacy, Peking University First Hospital, Beijing. FAU - Xu, Xiping AU - Xu X AD - National Clinical Research Center for Kidney Disease, State Key Laboratory for Organ Failure Research, Renal Division, Nanfang Hospital, Southern Medical University, Guangzhou. AD - Beijing Advanced Innovation Center for Food Nutrition and Human Health, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China. FAU - Qin, Xianhui AU - Qin X AD - National Clinical Research Center for Kidney Disease, State Key Laboratory for Organ Failure Research, Renal Division, Nanfang Hospital, Southern Medical University, Guangzhou. LA - eng PT - Journal Article DEP - 20180115 PL - New Zealand TA - Clin Epidemiol JT - Clinical epidemiology JID - 101531700 PMC - PMC5774486 OTO - NOTNLM OT - annual rate of eGFR decline OT - chronic kidney disease OT - cigarette smoking OT - hypertensive adults OT - rapid renal function decline OT - serum bilirubin COIS- Disclosure Dr Xiping Xu reports grants from the Projects of the National Natural Science Foundation of China (81473052); the Science and Technology Project of Guangdong Province (2014B090904040); the Science and Technology Planning Project of Guangzhou, China (201606211534575); and the Science, Technology and Innovation Committee of Shenzhen (JSGG20160229173428526, KC2014JSCX0071A). Dr Xianhui Qin reports grants from the Projects of the National Science Foundation (81402735). Dr Binyan Wang reports grants from the National Key Research and Development Program (2016YFC0903101, 2016YFC0904900). Dr Guobao Wang reports grants from the Projects of the National Science Foundation (81670669). The authors report no other conflicts of interest in this work. EDAT- 2018/02/03 06:00 MHDA- 2018/02/03 06:01 PMCR- 2018/01/15 CRDT- 2018/02/03 06:00 PHST- 2018/02/03 06:00 [entrez] PHST- 2018/02/03 06:00 [pubmed] PHST- 2018/02/03 06:01 [medline] PHST- 2018/01/15 00:00 [pmc-release] AID - clep-10-121 [pii] AID - 10.2147/CLEP.S150687 [doi] PST - epublish SO - Clin Epidemiol. 2018 Jan 15;10:121-132. doi: 10.2147/CLEP.S150687. eCollection 2018.