Characteristics of patients with breast cancer who were identified in the three administrative healthcare databases
| Characteristics | Unit 1 (Umbria) | Unit 2 (ASL Napoli 3 Sud) | Unit 3 (Friuli Venezia Giulia) |
| Invasive carcinoma | |||
| Incident cases (N medical chart reviewed) | 128 | 126 | 130 |
| ICD-9 code | |||
| 174.0 nipple and areola | – | 1 (1) | – |
| 174.1 central portion | 16 (13) | 10 (8) | 6 (5) |
| 174.2 upper-inner quadrant | 4 (3) | 8 (6) | 14 (11) |
| 174.3 lower-inner quadrant | 6 (5) | 5 (4) | 9 (7) |
| 174.4 upper-outer quadrant | 57 (45) | 43 (34) | 45 (35) |
| 174.5 lower-outer quadrant | 6 (5) | 5 (4) | 13 (10) |
| 174.6 axillary tail | – | – | – |
| 174.8 other specified sites of the female breast | – | – | – |
| 174.9 breast female, unspecified | 7 (5) | 38 (30) | 34 (26) |
| 174.0 nipple and areola | 32 (25) | 16 (13) | 9 (7) |
| Admission to department | |||
| Medical | 20 (16) | 11 (9) | 8 (6) |
| Surgical | 108 (84) | 115 (91) | 122 (94) |
| Age, N (%) | |||
| <40 | 9 (7) | 6 (5) | 1 (1) |
| 40–59 | 40 (31) | 56 (44) | 45 (35) |
| ≥60 | 79 (62) | 64 (51) | 84 (65) |
| Instrumental diagnosis | |||
| Breast ultrasound | 39 (30) | 88 (70) | 5 (4) |
| Mammography | 54 (42) | 60 (48) | 7 (5) |
| CT scan (breast) | 11 (8) | 1 (1) | 2 (2) |
| MRI (breast) | 3 (2) | 17 (14) | 8 (6) |
| Surgical procedures | |||
| Mastectomy | 28 (22) | 29 (23) | 35 (27) |
| Quadrantectomy | 79 (62) | 73 (58) | 54 (42) |
| Histological documentation | |||
| Needle aspiration | 32 | 34 | – |
| Needle biopsy | 27 | 40 | 5 |
| Nodule (after surgical intervention) | 115 | 117 | 112 |
| Carcinoma in situ | |||
| Incident cases (N medical chart reviewed) | 50 | 88 | 108 |
| ICD-9 code | |||
| 233.0 | 50 (100) | 88 (100) | 108 (100) |
| Admission to department | |||
| Medical | – | 7 (8) | – |
| Surgical | 50 (100) | 81 (92) | 108 (100) |
| Age, N (%) | |||
| <40 | 2 (4) | 3 (3) | 1 (1) |
| 40–59 | 27 (54) | 50 (57) | 52 (48) |
| >60 | 21 (42) | 35 (40) | 55 (51) |
| Instrumental diagnosis | |||
| Breast ultrasound | 3 (6) | 65 (74) | 30 (28) |
| Mammography | 6 (12) | 37 (42) | 39 (36) |
| CT scan (breast) | – | – | – |
| MRI (breast) | 2 (4) | 22 (25) | 4 (4) |
| Surgical procedures | |||
| Mastectomy | 18 (36) | 13 (15) | 15 (14) |
| Quadrantectomy | 32 (64) | 47 (53) | 55 (52) |
| Histological documentation | |||
| Needle aspiration | – | 16 (18) | 1 (1) |
| Needle biopsy | 8 (16) | 53 (60) | 4 (4) |
| Nodule (after surgical intervention) | 50 (100) | 77 (88) | 94 (87) |
ICD-9, International Classification of Diseases, Ninth Revision.