Table 1. Epidemiological characteristics of breast carcinoma in situ in China.
| Characteristics | N | % |
|---|---|---|
| Age (years) | ||
| Mean±SD | 48.28±11.24 | - |
| Range | 24~80 | - |
| ≤29 | 3 | 2.10 |
| 30-39 | 29 | 20.28 |
| 40-49 | 57 | 39.86 |
| 50-59 | 29 | 20.28 |
| ≥60 | 25 | 17.48 |
| BMI | ||
| Mean±SD | 23.38±3.15 | - |
| Range | 16.82~31.63 | - |
| Underweight(≤18.49) | 3 | 2.44 |
| Normal(18.50~24.99) | 85 | 69.11 |
| Overweight(25.00~29.99) | 30 | 24.39 |
| Obesity(≥30.00) | 5 | 4.07 |
| Occupation | ||
| Housewife | 5 | 3.50 |
| Manual worker | 56 | 39.16 |
| Mental worker | 51 | 35.66 |
| Others | 31 | 21.68 |
| Education | ||
| None | 3 | 2.10 |
| Primary school | 8 | 5.59 |
| Middle school | 16 | 11.19 |
| High school | 9 | 6.29 |
| University and above | 12 | 8.39 |
| Unknown | 95 | 66.43 |
| Menopausal status | ||
| Pre-menopause | 98 | 68.53 |
| Post-menopause | 45 | 31.47 |
| Marital status | ||
| Single | 2 | 1.40 |
| Married | 138 | 96.50 |
| Widowed/divorced | 3 | 2.10 |
| Breast feeding history | ||
| Yes | 94 | 65.73 |
| No | 11 | 7.69 |
| Unkown | 38 | 26.57 |
| Breast cancer family history | ||
| Yes | 5 | 3.50 |
| No | 133 | 93.01 |
| Unknown | 5 | 3.50 |
BMI, body mass index