marginally significantp = 0.083
Blood lead levels (BLL) show a marginally significant positive association with mortality (p = 0.083), but ethnicity, geographic location, and living in small metropolitan areas do not have a significant impact.” However, when prompted to interpret regression diagnostics for the CPH model, ChaGPT warns that “The global Schoenfeld residuals test indicates a violation of the proportional hazards assumption for the overall model, with significant issues for covariates such as age, grade, income ratio, ethnicity (non-Hispanic), and race (Black), while the assumption holds for blood lead levels (BLL).