create short paragraph: What does this mean for methodology? The proportional hazards assumption appears justifiable. This supports your use of the Cox proportional hazards model to investigate the effect of hypertension on time to stroke, as it satisfies this crucial prerequisite. If the curves were not parallel, alternative modelssuch as stratified Cox models, time-dependent covariates, or parametric survival modelswould be required to address non-proportionality. Visual confirmation, together with statistical tests (e.g., Schoenfeld residuals), strengthens the validity of subsequent Cox modeling and the interpretation that hypertension increases the instantaneous risk of stroke consistently over time