| Smokers from KNHANES IV | Smokers who used a Web-based cessation service | Smokers who used Quitline | Smokers who used a PHC-based SCC | p-value |
---|---|---|---|---|---|
 | n = 3762 | n = 14,762 | n = 2983 | n = 335,532 |  |
Gender | |||||
 Male | 3177 (87.2) | 12,533 (84.9) | 2610 (87.5) | 303,220 (90.4) | <.0001 |
 Female | 585 (12.8) | 2229 (15.1) | 373 (12.5) | 32,312 (9.6) |  |
Age group (years) | |||||
 19–29 | 640 (24.6) | 6746 (45.7) | 753 (25.2) | 45,997 (13.7) | <.0001 |
 30–39 | 945 (27.0) | 5781 (39.2) | 1210 (40.6) | 82,430 (24.6) |  |
 40–49 | 819 (23.2) | 1794 (12.2) | 731 (24.5) | 79,779 (23.8) |  |
  ≥ 50 | 1358 (25.2) | 441 (3.0) | 289 (9.7) | 127,326 (38.0) |  |
Area of residence | |||||
 Metropolitan | 2119 (53.1) | 8516 (57.7) | 1639 (56.4) | 195,956 (58.4) | <.0001 |
 City/country | 1643 (46.9) | 6030 (40.9) | 1268 (43.6) | 139,576 (41.6) |  |
 Overseas | – | 216 (1.5) | – |  |  |
Occupation | |||||
 Professionals and experts | 482 (14.7) | – | 369 (12.4) | 44,307 (13.2) | <.0001 |
 Office workers | 340 (9.6) | – | 973 (32.8) | 45,845 (13.7) |  |
 Service workers | 565 (16.7) | – | 361 (12.2) | – |  |
 Manufacturing and production workers | 1060 (30.3) | – | 125 (4.2) | 22,955 (6.8) |  |
 Farming and fishing workers | 331 (4.9) | – | 15 (0.5) | 17,181 (5.1) |  |
 Small business owners | – | – | 396 (13.3) | 72,634 (21.7) |  |
 Military and police | 14 (0.3) | – | 73 (2.5) | 14,694 (4.4) |  |
 Others (e.g., housewives, retired or unemployed people, university students) | 943 (23.4) | – | 658 (22.2) | 117,916 (35.1) |  |
Average number of cigarettes smoked per day | |||||
  ≤ 10 | 1483 (38.8) | 2034 (14.9) | 788 (26.6) | 71,836 (21.4) | <.0001 |
 11–20 | 1831 (49.2) | 7750 (56.6) | 1524 (51.4) | 177,958 (53.0) |  |
  ≥ 20 | 444 (12.0) | 3899 (28.5) | 651 (22.0) | 85,738 (25.6) |  |
Nicotine dependency | |||||
 0–3 (mild) | – | 3118 (24.2) | 1290 (44.0) | 105,121 (31.3) | <.0001 |
 4–6 (moderate) | – | 5584 (43.4) | 1105 (37.7) | 137,686 (41.0) |  |
 7–10 (severe) | – | 4180 (32.5) | 537 (18.3) | 92,725 (27.6) |  |