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Fig. 2 | BMC Medical Research Methodology

Fig. 2

From: A novel approach to determine two optimal cut-points of a continuous predictor with a U-shaped relationship to hazard ratio in survival data: simulation and application

Fig. 2

Different forms of s(x) in the simulation. Five forms of s(x) are used to simulate symmetrical and asymmetrical U-shaped relationships between a continuous variable and log relative hazards. Parameter k1 is the slope of the left line in a U-shaped or V-shaped curve, parameter k2 is the slope of the right line and parameter a is the value of the turning point in the x-axis

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BMC Medical Research Methodology

ISSN: 1471-2288

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