Fig. 1From: Tests of trend between disease outcomes and ordinal covariates discretized from underlying continuous variables: simulation studies and applications to NHANES 2007–2008Simulated type I error rates for each method with binary outcomes by increasing intercept in Eq. (1), which in this case is equal to the log-odds of the event for a person with a BMI of 25 kg/m2.The dashed horizontal line at 0.05 indicates the significance levelBack to article page