Associations of Physical Activity With Mortality Across Cardiovascular–Kidney–Metabolic Syndrome Stages: Evidence From NHANES 1999 to 2018
Background Cardiovascular–kidney–metabolic (CKM) syndrome integrates cardiovascular, renal, and metabolic dysfunction and is associated with high mortality. Stage‐stratified evidence linking physical activity (PA) to mortality remains limited. Methods We analyzed 19 930 adults with CKM stages 0 to 4 from the NHANES (Na...