Table 1.

Demographic and clinical characteristics of patients with CKD exclusively followed in primary care stratified for CKD stage

Overall (n=30,326)CKD StageP Value
1 (n=904)2 (n=3142)3a (n=19,561)3b (n=5341)4 (n=1083)5 (n=295)
Age (yr)71.0±11.057.0±14.566.0±12.071.7±9.976.2±9.777.0±11.268.9±13.5<0.001
Women (%)64.535.544.767.868.766.163.7<0.001
Smoking (%)13.827.018.912.710.813.217.8<0.001
Diabetes (%)24.554.446.019.225.527.926.1<0.001
Coronary artery disease (%)14.79.113.713.817.822.615.3<0.001
TIA/stroke (%)8.54.87.67.811.613.07.5<0.001
CHF (NYHA II and III; %)1.20.60.80.82.53.01.4<0.001
Peripheral vascular disease (%)10.79.311.89.413.716.711.2<0.001
eGFR (ml/min per 1.73 m2)53±16106±2473±854±440±425±49±3
Total cholesterol (mg/dl)a217±34210±34212±34218±34216±34211±35210±340.52
Systolic BP (mmHg)b141±17139±16140±16140±17141±17141±19140±18<0.001
Diastolic BP (mmHg)82±984±982±981±980±980±982±90.04
  • Values are mean±SD or percentage. TIA, transient ischemic attack; CHF, congestive heart failure; NYHA, New York Heart Association Class.

  • a Missing values=5430.

  • b Missing values=6617.