Conclusion
In conclusion, this study found that the overall prevalence of paranasal sinusitis in Chinese adults aged 35–75 years is 15.4 %. The major risk factors for paranasal sinusitis include age, sex, and smoking. In non-smokers, the prevalence of paranasal sinusitis increases with age, while in smokers, sinusitis more often involves the anterior nasal sinuses. These results may facilitate the understanding of the epidemiology of paranasal sinusitis detected by MRI and prove valuable in the prevention and treatment of paranasal sinusitis.