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Table 5 Description of the results according to the FNAC* results

From: Statistical methods for evaluating the fine needle aspiration cytology procedure in breast cancer diagnosis

Characteristic Negative (N = 771)a Positive (N = 842)a Suspect (N=154)a
Age (years) 50 (13) 61 (14) 57 (13)
Side    
Right 373 (48%) 383 (45%) 71 (46%)
Left 398 (52%) 459 (55%) 83 (54%)
Size (mm) 15 (37) 28 (41) 17 (15)
ACR*    
1 4 (1%) 1 (0.1%) 0 (0%)
2 97 (12.5%) 3 (0.4%) 0 (0%)
3 440 (57%) 13 (1.5%) 12 (8%)
4 188 (24.5%) 177 (21%) 62 (41%)
5 39 (5%) 643 (77%) 78 (51%)
Unknown 3 5 2
Echoguided 626 (81%) 342 (41%) 96 (62%)
Infiltrating canal carcinoma 22 (2.9%) 707 (84%) 98 (64%)
Unknown 2 0 0
Intracanalar carcinoma 8 (1.0%) 161 (19%) 33 (21%)
Infiltrating lobular carcinoma 9 (1.2%) 95 (11%) 20 (13%)
Lobular carcinoma in situ 5 (0.6%) 17 (2.0%) 8 (5.2%)
Disease status    
Benign histology 115 (15%) 1 (0.1%) 31 (20%)
Malignant histology 24 (2.9%) 803 (95.5%) 120 (78%)
Benign follow-up 471 (61%) 0 (0%) 1 (0.5%)
Malignant follow-up 1 (0.1%) 12 (1.4%) 0 (0%)
Lost to follow-up 160 (21%) 26 (3%) 2 (1.5%)
  1. *FNAC fine needle aspiration cytology, *ACR american college of radiology
  2. aMean (SD); n (%)