Body Mass Index and 1-Year Unplanned Readmission in Chinese Patients with Acute Myocardial Infarction: A Retrospective Cohort Study

Table 3

Relationship between BMI and readmission of AMI in different models.

Variable	Crude model		Model I		Model II
	HR (95% CI)	value	HR (95% CI)	value	HR (95% CI)	value
BMI (kg/m^2)	1.02 (0.92, 1.13)	0.705	1.06 (0.95, 1.17)	0.314	1.13 (0.94, 1.36)	0.194
BMI
T1	Reference		Reference		Reference
T2	0.45 (0.05, 4.38)	0.532	0.38 (0.03, 6.45)	0.439	_§	0.873
T3	0.58 (0.05, 8.57)	0.592	0.72 (0.03, 12.86)	0.765	_§	0.873
For trend		0.516		0.246		0.500

CI, confidence interval. Model I: adjusted for age and gender. Model II: adjusted for age, gender, TC, triglyceride, HDL-C, LDL-C, PT, APTT, INR, creatinine, HGB, LVEF, discharge medications, marital status, educational level, COPD, diabetes mellitus, heart failure, history of ischemic stroke, history of hemorrhagic stroke, arrhythmia, and hypertension._§: the model failed because of the small size.