[Retracted] Clinical Value of the Prognostic Nutrition Index in the Assessment of Prognosis in Critically Ill Patients with Stroke: A Retrospective Analysis

Table 3

Nonlinearity addressing by weighted two-piecewise linear model.

Outcome	30-day mortality; HR (95% CIs) value
Linear regression model	0.99 (0.97, 1.00) 0.0370
Two-piecewise linear regression model
Inflection point	49.4
<49.4	0.97 (0.96, 0.99) 0.0011
≥49.4	1.04 (1.01, 1.07) 0.0529
Log likelihood ratio test	0.012