If we adjusted for other coronary heart disease risk factors such as age, hypertension, and smoking, the corresponding values would be 2.3 (Cl, 0.9 to 6.2), 1.8 (Cl, 0.9 to 3.6), and 2.6 (Cl, 1.3 to 5.2), respectively.??? Conclusion: The results suggest that chronic C. pneumoniae infection may be a significant risk factor for the development of coronary heart disease.