Table 2.
Predictive variable | Partial regression coefficient(95 % Confidence interval) | P-value |
---|---|---|
Percent change in LF/HF | −0.035 (−0.049, −0.020) | <0.001 |
Age (years) | 0.184 (−0.221, 0.588) | 0.365 |
Spinal anesthesia-induced hypotension | −0.791 (−5.828, 4.245) | 0.754 |
Duration of tourniquet inflation (min) | 0.069 (−0.343, 0.482) | 0.738 |
Intercept | −25.342 (−57.424, 6.741) | 0.119 |
Coefficient of determination (R2)=0.340, adjusted R2=0.286, P<0.001. LF/HF, low-to-high frequency ratio of heart rate variability. No multicollinearity was detected.