Table 3

Results of quadratic regression analyses

Dependent variable: Length of hospital stay
Model summaryParameter estimates
R2 Fdf1df2Model p valueConstantLinear coefficient
(p value)
Quadratic coefficient
(p value)
Alive within 30 days0.0623.672726<0.0011.125.10 (p=0.01)−0.41 (p=0.27)
Died within 30 days0.148.582106<0.00126.13−11.45 (p=0.001)1.65 (p=0.01)
  • The independent variable is Waterlow score categories (4–9,10–14,15–19, 20–24, 25+).