Association between smoking and chronic kidney disease: a case control study

Area of Science:

• Nephrology
• Epidemiology
• Public Health

Background:

• Chronic kidney disease (CKD) progression is a major challenge in nephrology.
• Identifying preventable risk factors is crucial for reducing end-stage renal disease.
• Understanding pathophysiological mechanisms aids in slowing CKD progression.

Purpose of the Study:

• To investigate the association between smoking and the risk of developing chronic kidney disease (CKD).
• To determine if smoking is an independent risk factor for CKD.
• To assess the impact of smoking on specific types of CKD, including hypertensive and diabetic nephropathy.

Main Methods:

• A case-control study was conducted analyzing smoking data in 198 patients with stage 3 or higher CKD (2005-2009).
• Patients were matched with a randomly selected control group using computerized randomization.
• Odds ratios (OR) were calculated using multinomial logistic regression to estimate relative risk.

Main Results:

• Smoking was found to significantly increase the risk of CKD (OR = 1.6, p = 0.009).
• Current smokers exhibited a higher risk (OR = 1.63, p = 0.02) compared to nonsmokers; former smokers showed no significant difference.
• The risk was substantially higher for individuals with over 30 pack-years of smoking (OR = 2.6, p = 0.00) and was particularly elevated in hypertensive (OR = 2.85, p = 0.01) and diabetic nephropathy (OR = 2.24, p = 0.005).

Conclusions:

• Heavy cigarette smoking is a significant risk factor for chronic kidney disease (CKD).
• Smoking particularly increases the risk for CKD associated with hypertension and diabetes.
• Reducing smoking prevalence could be a key strategy in preventing CKD progression.