Smoking linked to increased risk of chronic kidney disease in later stages, finds study

While observational studies indicated a positive association between smoking status and the risk of CKD, the Mendelian randomization analysis revealed no evidence of a causal relationship. Specifically, genetic variants associated with smoking behavior did not show a direct causal effect on CKD development​​.

These findings suggest that the previously observed associations in observational studies might be influenced by confounding factors rather than a direct causal link. Researchers propose that factors such as diabetes and hypertension may act as mediators in the relationship between smoking and CKD​.

“Our results emphasize the need for more detailed mediation analyses on large-scale, multi-ethnic datasets to fully understand the interplay between smoking and CKD,” said Professor Luxia Zhang. “While smoking remains a significant health risk factor, its direct role in CKD development requires further investigation.”

Future research will aim to address these complexities by analyzing the potential mediation pathways and exploring the role of other environmental and genetic factors.

This study provides valuable insights into CKD prevention strategies and highlights the importance of addressing confounding factors in public health research.

Reference:

Zhilong Zhang, Feifei Zhang, Xiaomeng Zhang, Lanlan Lu, Luxia Zhang. Association of Smoking with Chronic Kidney Disease Stages 3 to 5: A Mendelian Randomization Study. Health Data Sci. 2024;4:0199.DOI:10.34133/hds.0199