Clinical Focus ›› 2025, Vol. 40 ›› Issue (6): 513-518.doi: 10.3969/j.issn.1004-583X.2025.06.006

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Association of poor living habits and smoking with primary membranous nephropathy

Song Chenlu1, Qi Xiaojing2, Chen Yipeng1, Xing Guangqun2()   

  1. 1. Qingdao University, Qingdao 266000, China
    2. Department of Nephrology,the Affiliated Hospital of Qingdao University, Qingdao 266555, China
  • Received:2025-02-07 Online:2025-06-20 Published:2025-07-01
  • Contact: Xing Guangqun E-mail:xinggq@qdu.edu.cn

Abstract:

Objective To investigate the effects of unhealthy lifestyle and smoking on primary membranous nephropathy (PMN). Methods A total of 227 PMN patients (PMN group) and 58 minimal change nephropathy (MCD) patients (MCD group) who were first diagnosed in the Affiliated Hospital of Qingdao University from October 2016 to March 2023 were retrospectively analyzed. All patients met the pathological diagnostic criteria of PMN or MCD. Clinical data and questionnaire data were collected. In addition, the questionnaire survey data of five other hospitals from January to March 2023 (77 PMN patients and 20 MCD patients) were included to form a multi-center cohort (304 PMN patients and 78 MCD patients).Results There were significant differences in male gender, age, history of hypertension, systolic blood pressure, diastolic blood pressure, high-salt diet, high-fat diet, frequent eating out (restaurant or takeaway), drinking history and smoking history between the two groups in the single-center and multi-center cohorts (P<0.05). In the multi-center cohort, there were significant differences in the cumulative time of smoking, daily smoking volume and smoking index between the two groups (P<0.05), and the proportion of diabetes history, eating midnight snack and full dinner in PMN group was significantly higher (P<0.05). Although the indexes of cholesterol in PMN group were lower than those in MCD group, the levels of serum oxidized low density lipoprotein and malondialdehyde were higher, and the level of catalase was lower (P<0.05).Conclusion Unhealthy lifestyle and smoking may be involved in the occurrence of PMN and may produce a higher oxidative stress state.

Key words: glomerulonephritis, membranous, nephrosis, lipoid, dietary preference, smoking, oxidative stress

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