Table 1.

General characteristics of study subjects according to sex, age and other selected variables (Chungcheong province, KNHANES III) % (SE)

¹⁾Low income: monthly income < minimum cost of living × 1.2

Middle income: minimum cost of living × 1.2 ≤ monthly income < minimum cost of living × 2.5

High income: monthly income ≥ minimum cost of living × 2.5

²⁾METs are multiples of the resting metabolic rates and calculated using the short form (version 2.0, April 2004) of the International Physical Activity Questionnaire (Low activity: 600 > MET-minutes/week, Moderate activity: 600 ≤ MET-minutes/week < 3000, and High activity: 3000 ≤ MET-minutes/week).

³⁾Significantly different at α = 0.05 by t-test.

⁴⁾Mean ± SE

⁵⁾SBP: systolic blood pressure, DBP: diastolic blood pressure