Abstract

Smoking is one of the risk factors that may affect kidney health due to exposure to various toxic substances contained in cigarette smoke, including nicotine, carbon monoxide, and heavy metals such as lead (Pb). Continuous exposure to these substances may induce oxidative stress, endothelial dysfunction, hemodynamic changes, and vascular damage, potentially affecting renal perfusion and reducing the glomerular filtration rate. Serum creatinine is one of the laboratory parameters used to assess kidney function and may provide an initial indication of potential filtration impairment. This study aimed to describe serum creatinine levels among active smokers in Suli Village, Salahutu District. This descriptive study involved 20 active smokers selected using purposive sampling based on predetermined inclusion and exclusion criteria. Serum creatinine levels were examined using the Jaffe method with a BA-200 Biosystems Chemistry Analyzer. The results showed that 15 respondents (75%) had serum creatinine levels within the normal range, while 5 respondents (25%) had serum creatinine levels above the normal range. Abnormally elevated creatinine levels were found among respondents who were older, had smoked for more than 5 years, consumed a higher number of cigarettes, and had inadequate water intake. The findings indicate that most active smokers had serum creatinine levels within the normal range; however, 25% of respondents had elevated creatinine levels that warrant attention. These findings highlight the importance of education regarding the impact of smoking on kidney health and the need for regular kidney function monitoring, particularly among smokers with long-term and high-intensity smoking habits.