Association between Neutrophil Levels on Admission and All-Cause Mortality in Geriatric Patients with Hip Fractures: A Prospective Cohort Study of 2,589 Patients

Table 4

Nonlinearity of neutrophil () versus mortality (N = 2589).

Outcome	HR (95%CI) value
Fitting model by stand linear regression	1.03 (1.00, 1.06) 0.0210
Fitting model by two-piecewise linear regression
Inflection point	5.27
<5.27	0.99 (0.88, 1.11) 0.8471
>5.27	1.04 (1.01, 1.07) 0.0193
for log-likelihood ratio test	0.462

Adjusted for age, sex, injury mechanism, fracture classification, aCCI, hypertension, CHD, arrhythmia, ischemic stroke, cancer, dementia, COPD, hepatitis, time to admission and operation, treatment strategy, operation time, and infusion.