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Table 4 Nonlinearity of preoperative cholinesterase (*1000 U/L) versus mortality (N = 2387)

From: The association between preoperative serum cholinesterase and all-cause mortality in geriatric patients with hip fractures: a cohort study of 2387 patients

Outcome

HR (95%CI) P value

Fitting model by stand linear regression

0.83 (0.78, 0.88) < 0.0001

Fitting model by two-piecewise linear regression

Inflection point

5940

  < 5940

0.72 (0.66, 0.79) < 0.0001

  > 5940

1.01 (0.91, 1.11) 0.9157

 P for log-likelihood ratio test

 < 0.001

  1. Adjust for: age; gender; injury mechanism; fracture classification; aCCI; CHD; arrhythmia; ischemic stroke; cancer; dementia; COPD; virus hepatitis; time to operation; treatment strategy; operation time; infusion; transfusion; and stay in hospital