Table 2.
General characteristics of breast cancer cases
| Variables by level | Total distribution | Clinical Stage I&II | Clinical Stage III&IV | ES vs. LS P-value |
|||
|---|---|---|---|---|---|---|---|
| (N = 4211) | (N = 2554) | (N = 901) | |||||
| n | % | n | % | n | % | ||
|
Age at Diagnosis (Years) (4211, 2554, 901) |
|||||||
| Mean ± SD | 48.7 ± 10.5 | -- | 49.1 ± 10.4 | -- | 48.8 ± 10.3 | -- | 0.345a |
| Range | 21~86 | -- | 21~86 | -- | 21~85 | -- | |
| ≤ 29 | 80 | 1.9 | 38 | 1.5 | 17 | 1.9 | |
| 30-39 | 710 | 16.9 | 404 | 15.8 | 144 | 16.0 | |
| 40-49 | 1624 | 38.6 | 987 | 38.7 | 341 | 37.9 | 0.088b |
| 50-59 | 1147 | 27.2 | 693 | 27.1 | 276 | 30.6 | |
| ≥ 60 | 650 | 15.4 | 432 | 16.9 | 123 | 13.7 | |
|
Body Mass Index (3281, 2107, 646 ) |
|||||||
| Mean ± SD | 23.4 ± 3.3 | -- | 23.3 ± 3.2 | -- | 23.5 ± 3.4 | -- | 0.173a |
| Range | 12.8~39.4 | -- | 14.7~36.1 | -- | 12.8~39.4 | -- | |
| Underweight (≤ 18.49) | 140 | 4.3 | 74 | 3.5 | 30 | 4.6 | |
| Normal Weight (18.50~24.99) | 2217 | 67.6 | 1461 | 69.3 | 424 | 65.6 | 0.196b |
| Overweight (25.00~29.99) | 818 | 24.9 | 511 | 24.3 | 167 | 25.9 | |
| Obesity (≥ 30.00) | 106 | 3.2 | 61 | 2.9 | 25 | 3.9 | |
| Occupation (3623, 2192, 796) | |||||||
| Housewife | 173 | 4.8 | 127 | 5.8 | 26 | 3.3 | |
| Manual Worker | 1893 | 52.3 | 1099 | 50.1 | 474 | 59.6 | < 0.001b |
| Mental Worker | 1028 | 28.4 | 659 | 30.1 | 189 | 23.7 | |
| Others | 529 | 14.6 | 307 | 14.0 | 107 | 13.4 | |
| Education (2091, 1315, 486) | |||||||
| None | 186 | 8.9 | 112 | 8.5 | 55 | 11.3 | |
| Primary School | 462 | 22.1 | 273 | 20.8 | 115 | 23.7 | |
| Middle School | 606 | 29.0 | 370 | 28.1 | 141 | 29.0 | 0.008b |
| High School | 441 | 21.1 | 280 | 21.3 | 106 | 21.8 | |
| University and above | 396 | 18.9 | 280 | 21.3 | 69 | 14.2 | |
| Marital Status (4193, 2548, 899) | |||||||
| Single | 51 | 1.2 | 25 | 1.0 | 14 | 1.6 | |
| Married | 4090 | 97.5 | 2482 | 97.4 | 878 | 97.7 | 0.073b |
| Widowed/Divorced | 52 | 1.2 | 41 | 1.6 | 7 | 0.8 | |
| Region (4211, 2554, 901)* | |||||||
| More Developed | 1851 | 44.0 | 1127 | 44.1 | 389 | 43.2 | 0.620b |
| Less Developed | 2360 | 56.0 | 1427 | 55.9 | 512 | 56.8 | |
| Smoking History (4211, 2554, 901) | |||||||
| Never | 2468 | 58.6 | 1451 | 56.8 | 596 | 66.2 | |
| Used | 47 | 1.1 | 37 | 1.5 | 9 | 1.0 | < 0.001c |
| current | 12 | 0.3 | 5 | 0.2 | 3 | 0.3 | |
| Unknown | 1684 | 40.0 | 1061 | 41.5 | 293 | 32.5 | |
|
Alcohol Drinking History (4211, 2554, 901) |
|||||||
| Never | 2427 | 57.6 | 1415 | 55.4 | 598 | 66.4 | |
| Used | 82 | 2.0 | 70 | 2.7 | 6 | 0.7 | < 0.001c |
| Now | 13 | 0.3 | 7 | 0.3 | 4 | 0.4 | |
| Unknown | 1689 | 40.1 | 1062 | 41.6 | 293 | 32.5 | |
| Breast Cancer Family History (4128, 2517, 882) | |||||||
| Yes | 144 | 3.5 | 96 | 3.8 | 21 | 2.4 | 0.045b |
| No | 3984 | 96.5 | 2421 | 96.2 | 861 | 97.6 | |
a Student's t-test
b Chi-square test
c Fisher's exact test
* More Developed Regions: North, South, and East
Less Developed Regions: North-East, Central, North-West, South-West.