Table 1.
Basic characteristics of the study population by in 3 KNHANES phases
| Variable | KNHANES |
|||||
|---|---|---|---|---|---|---|
| Men |
Women |
|||||
| 1998 | 2001 | 2005 | 1998 | 2001 | 2005 | |
| No. subjects (%) | 3597 (45.2) | 2810 (43.7) | 2314 (42.6) | 4365 (54.8) | 3626 (56.3) | 3124 (57.4) |
| Age (yr) | ||||||
| 20–29 | 659 (18.3) | 458 (16.3) | 274 (11.8) | 834 (19.1) | 619 (17.1) | 403 (12.9) |
| 30–39 | 923 (25.7) | 711 (25.3) | 497 (21.5) | 1 045 (23.9) | 920 (25.4) | 723 (23.1) |
| 40–49 | 775 (21.5) | 675 (24.0) | 595 (25.7) | 855 (19.6) | 820 (22.6) | 743 (23.8) |
| 50–59 | 575 (16.0) | 425 (15.1) | 407 (17.6) | 685 (15.7) | 502 (13.8) | 502 (16.1) |
| 60–69 | 445 (12.4) | 351 (12.5) | 370 (16.0) | 562 (12.9) | 434 (12.0) | 426 (13.6) |
| ≥70 | 220 (6.1) | 190 (6.8) | 171 (7.4) | 384 (8.8) | 331 (9.1) | 327 (10.5) |
| BMI (kg/m2) | ||||||
| <18.5 | 173 (4.8) | 89 (3.2) | 79 (3.4) | 235 (5.4) | 205 (5.7) | 147 (4.7) |
| 18.5–22.9 | 1 630 (45.4) | 1 092 (39.1) | 762 (33.2) | 1 969 (45.2) | 1 553 (43.1) | 1 318 (42.6) |
| 23–24.9 | 883 (24.6) | 700 (25.1) | 621 (27.1) | 924 (21.2) | 819 (22.7) | 700 (22.6) |
| ≥25 | 902 (25.1) | 913 (32.7) | 830 (36.2) | 1 227 (28.2) | 1 028 (28.5) | 932 (30.1) |
| WC (cm) | ||||||
| Lower tertile | 1 197 (33.3) | 714 (25.5) | 604 (26.2) | 1 377 (31.5) | 1 152 (31.9) | 962 (31.0) |
| Middle tertile | 1 139 (31.7) | 912 (32.5) | 683 (29.7) | 1 315 (30.1) | 1 068 (29.6) | 962 (31.0) |
| Higher tertile | 1 261 (35.1) | 1 177 (42.0) | 1 015 (44.1) | 1 673 (38.3) | 1 389 (38.5) | 1 181 (38.0) |
| Residential area | ||||||
| Large city | 1 412 (39.3) | 1 281 (45.6) | 994 (43.0) | 1 699 (38.9) | 1 680 (46.3) | 1 391 (44.5) |
| Medium city | 905 (25.2) | 870 (31.0) | 771 (33.3) | 1 073 (24.6) | 1 115 (30.8) | 1 029 (32.9) |
| Rural | 1 278 (35.5) | 659 (23.5) | 549 (23.7) | 1 593 (36.5) | 831 (22.9) | 704 (22.5) |
| Marital status | ||||||
| Married | 2 835 (78.8) | 2 200 (78.3) | 1 815 (78.6) | 3 095 (70.9) | 2 587 (71.3) | 2 155 (69.0) |
| Unmarried | 636 (17.7) | 488 (17.4) | 353 (15.3) | 488 (11.2) | 410 (11.3) | 359 (11.5) |
| Others | 126 (3.5) | 122 (4.3) | 140 (6.1) | 782 (17.9) | 629 (17.3) | 607 (19.4) |
| Education (yr) | ||||||
| <7 | 770 (21.4) | 431 (15.3) | 374 (16.2) | 1 659 (38.0) | 1 047 (28.9) | 959 (30.7) |
| 7–9 | 508 (14.1) | 359 (12.8) | 282 (12.2) | 621 (14.2) | 477 (13.2) | 367 (11.7) |
| 10–12 | 1 346 (37.4) | 1 031 (36.7) | 800 (34.6) | 1 370 (31.4) | 1 285 (35.4) | 1 026 (32.8) |
| ≥13 | 973 (27.1) | 989 (35.2) | 857 (37.1) | 715 (16.4) | 817 (22.5) | 772 (24.7) |
| Occupation | ||||||
| White collar | 1 259 (35.0) | 1 146 (40.8) | 886 (38.4) | 1 051 (24.1) | 991 (27.3) | 879 (28.1) |
| Blue collar | 1 561 (43.4) | 1 005 (35.8) | 906 (39.2) | 1 028 (23.6) | 551 (15.2) | 585 (18.7) |
| Unemployed | 777 (21.6) | 659 (23.5) | 518 (22.4) | 2 286 (52.4) | 2 083 (57.5) | 1 660 (53.1) |
| Income (million won) | ||||||
| <1.00 | 1 214 (33.8) | 484 (17.2) | 400 (17.5) | 1 588 (36.4) | 743 (20.5) | 641 (20.7) |
| 1.00–2.49 | 1 923 (53.5) | 1 490 (53.0) | 936 (40.9) | 2 207 (50.6) | 1 768 (48.8) | 1 185 (38.2) |
| 2.50–3.99 | 353 (9.8) | 510 (18.1) | 574 (25.1) | 450 (10.3) | 667 (18.4) | 776 (25.0) |
| ≥4.00 | 107 (3.0) | 326 (11.6) | 381 (16.6) | 120 (2.7) | 448 (12.4) | 497 (16.0) |
| Alcohol | ||||||
| Nondrinker | 377 (10.9) | 331 (12.9) | 130 (5.8) | 1 868 (44.0) | 1 308 (38.6) | 647 (21.2) |
| Current drinker | 3 075 (89.1) | 2 235 (87.1) | 2 093 (94.2) | 2 382 (56.0) | 2 080 (61.4) | 2 408 (78.8) |
| Smoking | ||||||
| Nonsmoker | 600 (17.4) | 525 (20.5) | 359 (16.1) | 3 856 (90.7) | 3 173 (93.7) | 2 786 (91.2) |
| Current smoker | 2 852 (82.6) | 2 041 (79.5) | 1 864 (83.9) | 394 (9.3) | 215 (6.3) | 269 (8.8) |
| Physical activity | ||||||
| Light | 1 414 (41.0) | 1 174 (45.8) | 932 (41.9) | 1 943 (45.7) | 1 825 (53.9) | 1 556 (50.9) |
| Moderate | 1 148 (33.3) | 945 (36.8) | 867 (39.0) | 1 761 (41.4) | 1 413 (41.7) | 1 301 (42.6) |
| Heavy | 890 (25.8) | 447 (17.4) | 424 (19.1) | 546 (12.8) | 150 (4.4) | 198 (6.5) |
Data are expressed as n(%).
BMI, body mass index; WC, waist circumference.