N | 7533 |
Age (years), median, SD (IQR) | 65.21, 11.72 (58–74) |
ICD9-CM code, N (%) | |
174.0 Nipple and areola | 97 (1.29) |
174.1 Central portion | 407 (5.40) |
174.2 Upper-inner quadrant | 690 (9.16) |
174.3 Lower-inner quadrant | 437 (5.80) |
174.4 Upper-outer quadrant | 2638 (35.02) |
174.5 Lower-outer quadrant | 490 (6.50) |
174.6 Axillary tail | 19 (0.25) |
174.8 Other specified sites of female breast | 791 (10.50) |
174.9 Malignant neoplasm of breast (female), unspecified | 1765 (23.43) |
196.3 Secondary malignant neoplasm of lymph nodes | 1801 (23.91) |
198.81 Secondary malignant neoplasm of breast | 19 (0.25) |
ICD9-CM, international classification of diseases-clinical modification.