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Nonlinearity of preoperative TTA and 1-year mortality.
| Outcome: | OR (95% CI) P |
|---|---|
| Fitting model by stand linear regression | 1.00 (1.00–1.00) 0.09 |
| Fitting model by two-piecewise linear regression | |
| Inflection point | 9 h |
| <9 h | 1.09 (1.03–1.16) <0.01 |
| >9 h | 1.00 (1.00–1.00) 0.26 |
| P for log-likelihood ratio test | <0.01 |
Outcome variable: one-year mortality.
Exposure variables: Time to admission (h).
Adjusted for age, CHD, dementia, time to operation, infusion, transferred and stay in hospital.
