Table 3.

A synergistic impact of BMI and gamma gap on mortality rate with different adjustment models.

Mortality rate	Hazard ratio (95% confidence interval), P value
	High BMI, low gamma gap (n = 286)	Low BMI, low gamma gap (n = 387)	High BMI, high gamma gap (n = 128)	Low BMI, high gamma gap (n = 186)
Model 1	Reference	1.25 (1.04–1.51), P = 0.019	1.78 (1.40–2.27), P <0.001	2.30 (1.85–2.85), P <0.001
Model 2	Reference	1.19 (0.98–1.43), P = 0.075	1.68 (1.32–2.14), P <0.001	2.20 (1.78–2.74), P <0.001
Model 3	Reference	1.09 (0.90–1.33), P = 0.380	1.51 (1.19–1.93), P = 0.001	1.65 (1.32–2.07), P <0.001

Model 1: unadjusted; model 2: adjusted for age and sex; model 3: adjusted for age, gender, heart rate, diastolic blood pressure, hemoglobin, albumin, high density lipoprotein cholesterol, creatinine, fasting plasma glucose, C-reactive protein and N-terminal pro-brain natriuretic peptide.

BMI body mass index.