Table 1.
Sociodemographic characteristics of the included patients who received national health screening during 2005–2007
| Total patients (n=5,831,039) | Male (n=3,208,125) | Female (n=2,622,914) | |
|---|---|---|---|
| Age (yr) | |||
| ≥ 20 and < 30 | 1,028,358 (17.6) | 499,383 (15.6) | 528,975 (20.2) |
| ≥ 30 and < 40 | 1,411,323 (24.2) | 1,007,648 (31.4) | 403,675 (15.4) |
| ≥ 40 and < 50 | 1,710,016 (29.3) | 884,570 (27.6) | 825,446 (31.5) |
| ≥ 50 and < 60 | 1,203,381 (20.6) | 586,348 (18.3) | 617,033 (23.5) |
| ≥ 60 and < 65 | 477,961 (8.2) | 230,176 (7.2) | 247,785 (9.4) |
| BMI | 23.4 (21.3–25.6) | 24.1 (22.1–26.0) | 22.4 (20.4–24.7) |
| Screening year | |||
| 2005 | 1,608,929 (27.6) | 869,492 (27.1) | 739,437 (28.2) |
| 2006 | 2,709,626 (46.5) | 1,551,651 (48.4) | 1,157,975 (44.1) |
| 2007 | 1,512,484 (25.9) | 786,982 (24.5) | 725,502 (27.7) |
| Smoking history | |||
| Never-smoker | 3,553,833 (60.9) | 1,225,457 (38.2) | 2,328,376 (88.8) |
| Ex-smoker | 512,534 (8.8) | 468,370 (14.6) | 44,164 (1.7) |
| Current smoker | 1,477,450 (25.3) | 1,384,209 (43.1) | 93,241 (3.6) |
| Not recorded | 287,222 (4.9) | 130,089 (4.1) | 157,133 (6.0) |
| Income | |||
| 1st (0%–25%) | 1,131,845 (19.4) | 469,056 (14.6) | 662,789 (25.3) |
| 2nd (25%–50%) | 1,357,739 (23.3) | 721,011 (22.5) | 636,728 (24.3) |
| 3rd (50%–75%) | 1,583,787 (27.2) | 955,146 (29.8) | 628,641 (24.0) |
| 4th (75%–100%) | 1,655,162 (28.4) | 983,715 (30.7) | 671,447 (25.6) |
| Not recorded | 102,506 (1.8) | 79,197 (2.5) | 23,309 (0.9) |
| Drinking behavior | |||
| < 3/wk | 5,108,203 (87.6) | 2,663,189 (83.0) | 2,445,014 (93.2) |
| ≥ 3/wk | 490,980 (8.4) | 433,887 (13.5) | 57,093 (2.2) |
| Not recorded | 231,856 (4.0) | 111,049 (3.5) | 120,807 (4.6) |
| Exercise behavior | |||
| < 3/wk | 4,539,320 (77.8) | 2,499,046 (77.9) | 2,040,274 (77.8) |
| ≥ 3/wk | 1,013,490 (17.4) | 570,131 (17.8) | 443,359 (16.9) |
| Not recorded | 278,229 (4.8) | 138,948 (4.3) | 139,281 (5.3) |
| Underlying chronic disease | |||
| Hypertension | 390,603 (6.7) | 200,085 (6.2) | 190,518 (7.3) |
| Diabetes mellitus | 130,321 (2.2) | 76,698 (2.4) | 53,623 (2.0) |
| Cardiovascular disease | 35,808 (0.6) | 19,129 (0.6) | 16,679 (0.6) |
| Stroke | 17,064 (0.3) | 10,048 (0.3) | 7,016 (0.3) |
| Liver disease | 77,767 (1.3) | 53,628 (1.7) | 24,139 (0.9) |
| Previous malignancy | 24,205 (0.4) | 8,230 (0.3) | 15,975 (0.6) |
| Blood chemistry | |||
| Hemoglobin (g/dL) | 14.1 (13.0–15.3) | 15.1 (14.4–15.8) | 13.0 (12.3–13.6) |
| Fasting glucose (mg/dL) | 90 (83–99) | 92 (83–101) | 89 (82–97) |
| Total cholesterol (mg/dL) | 190 (167–215) | 191 (169–216) | 188 (165–213) |
| Chest radiography | |||
| Normal | 5,189,969 (89.0) | 2,853,769 (89.0) | 2,336,200 (89.1) |
| Suspicious active pulmonary tuberculosis | 242,56 (0.4) | 16,505 (0.5) | 7,751 (0.3) |
| Suspicious inactive pulmonary tuberculosis | 301,362 (5.2) | 192,083 (6.0) | 109,279 (4.2) |
| Suspicious lung disease other than pulmonary tuberculosis | 117,372 (2.0) | 67,782 (2.1) | 49,590 (1.9) |
| Suspicious cardiovascular disease | 85,068 (1.5) | 33,142 (1.0) | 51,926 (2.0) |
| Not recorded | 113,012 (1.9) | 44,844 (1.4) | 68,168 (2.6) |
Values are presented as number (%) or median (IQR). BMI, body mass index; IQR, interquartile range.