SPSS 23.0 software was used for processing, count data were expressed as N (%), and comparison between groups was analyzed by χ2 test. All measurement data were tested by Shapiro–Wilk normality test, and the normal distribution was represented by mean ± standard deviation, and the ratio between groups was analyzed by independent sample t-test. Logistic regression analysis was used to test the relationship between olanzapine concentration and treatment effect in patients with schizophrenia. General linear bivariate Spearman linear correlation was used to test the relationship between olanzapine concentration and treatment effect-related indexes (PANSS score reduction rate) in schizophrenia patients. Test level α = 0.05.