Table 1

Baseline characteristics of the probability sample (subcohort) of SCCS participants and ESRD cases

Subcohort participants (n=4113)ESRD cases
Age at enrolment, years52.2±8.653.8±8.0
 <High school32.340.3
 ≥High school67.759.7
Household income
Cigarette smoking
 Current/former smoker67.358.3
 Never smoker32.741.7
BMI, kg/m230.3±7.332.8±8.8
Overweight or obese (BMI ≥25 kg/m2)74.882.5
eGFR, ml/min/1.73 m2102.8 (85.9–117.9)62.9 (36.0–98.1)
Sedentary and physical activity measures
Sitting, hours/day8.0 (5.5–12.0)8.2 (6.0–12.0)
 Car or bus, hours/day1.5±1.81.5±2.0
 At work, hours/day1.2±2.30.9±2.3
 TV or movies, hours/day3.8±2.94.3±3.1
 Home computer, hours/day0.5±1.10.3±0.9
 Other, hours/day*2.3±1.92.4±2.0
Physical activity, hours/day5.4 (2.9–9.4)4.3 (2.3–7.4)
Household/occupational activity, MET-hours/day
Sports, MET-hours/day
Total physical activity, MET-hours/day†17.2 (8.7–31.9)13.9 (6.9–24.6)
  • Values are listed as mean±SD or % or median (25th–75th centile).

  • *Includes sitting at meals, talking on the phone, reading, playing cards or sewing.

  • †Includes light, moderate and strenuous household/occupational activity as well as moderate and vigorous sports.

  • BMI, body mass index; eGFR, estimated glomerular filtration rate; ESRD, end-stage renal disease; MET, metabolic equivalent; SCCS, Southern Community Cohort Study.