White Blood Cell Count in Elderly Is Clinically Useful in Predicting Long-Term Survival

Table 2

Cox regression analyses of all-cause, cardiovascular, and noncardiovascular mortality according to WBC count stratified by sex (𝑛=207 men and  𝑛=220 women).

	HR	95% CI	𝑃 value
Men
All-cause mortality
Model 1	1.16	1.03–1.32	0.016
Model 3	1.12	0.98–1.28	0.092
Cardiovascular mortality
Model 1	1.21	1.01–1.45	0.038
Model 2	1.13	0.95–1.35	0.181
Noncardiovascular mortality
Model 1	1.12	0.95–1.33	0.171
Model 2	1.09	0.92–1.30	0.331
Women
All-cause mortality
Model 1	1.28	1.10–1.50	0.002
Model 3	1.23	1.03–1.47	0.020
Cardiovascular mortality
Model 1	1.30	1.04–1.62	0.021
Model 2	1.21	0.96–1.53	0.110
Noncardiovascular mortality
Model 1	1.27	1.03–1.58	0.028
Model 2	1.20	0.95–1.52	0.119

All hazard ratios (HR) are per 10⁹/L increase in WBC count. Model 1: crude HR, model 2: HR adjusted for current smoking and known hypertension, and model 3: HR adjusted for current smoking, known hypertension, prior myocardial infarction, known diabetes, total cholesterol, HDL-cholesterol, and BMI.