Table 1. Sociodemographic characteristics of study participants (2013 Korean National Health and Nutrition Examination Survey).

Values are presented as mean±standard error or number (%), unless otherwise indicated after survey analysis. The sum of each subgroup is not same because of missing data. Statistically significant results are marked in bold.

MET, metabolic equivalent of task; MVPA, moderate-to-vigorous physical activity.

^*T-tests for continuous variables and chi-square tests for categorical variables. ^†Quartiles were generated using monthly average household equivalent income in the same sex and age groups. ^‡Bereaved, divorced, separated, or no response. ^§Based on average physical activity levels (METs). Inactive job includes manager, specialist, office worker, and unemployed (housewife, student), and active job includes service worker and seller, foster and fishery worker, machine operator and assembler, and simple labor worker. ^∥Tertile cutoff points were 1,626 and 2,281. ^¶MVPA includes walking and moderate and vigorous physical activities. Cutoff points for tertile were 594 and 2,034 MET-min/wk. ^**Quintile cutoff points were 3.0, 4.5, 6.0, and 9.5 h/d.