Multivariable logistic regression model for schizophrenia.

SE: standard error; CI: confidence interval. Gating is defined as a dichotomous variable: P50 gating ratio greater than 0.4 or not. Smoke is defined as a dichotomous variable: smoking or not. a Wald chi-square tests. bP-values were 2-sided. Multivariable logistic regression model: n = 160, percentage of concordant pairs = 90.4%, percentage of discordant pairs = 9.6%, c statistic = 0.9043, Hosmer-Lemeshow Goodness-of-Fit test p = .640>.05 (df = 8). The estimated probability of having schizophrenia (the predicted value, ) can be obtained by using the following formula: where Gating equals 1 if P50 gating ratio >0.4, and 0 otherwise; Smoke equals 1 if smoking, and 0 otherwise.