Risk-Adjusted Cohort Study — Observational Epidemiology with Confounding Control

Risk-adjusted cohort study on observational epidemiological design, where a defined group of individuals is followed over time to compare outcomes between exposed and unexposed subgroups, with statistical methods applied to control for measured confounders. Adjustment strategies — including multivariable regression, propensity score matching, inverse probability weighting, or standardization — are used to reduce bias and produce effect estimates that more closely approximate what would be observed in a randomized trial.