Selection and Exclusion Criteria

Sample Size

Excluded

NCDB Breast PUF Cancer Cases

2696734

-

Year of diagnosis 2004 ~ 2015

1982168

714566

Include sequence number in 0 or 1

1645418

336750

Exclude cases treatment decision was not done at reporting facility

1581834

63584

Include Histology 8500 8501 8503 8522

1176472

405362

Exclude male patients

1165374

11098

Exclude tumor behavior as invasive

157044

1008330

Include Clinical and Pathological stage 0

57329

99715

Include Diagnostic Confirmation as 1 2

57320

9

Exclude Tumor Invasive Component defined by CS_SITESPECIFIC_FACTOR_6

57297

23

Exclude cases with positive regional nodes

57297

0

Exclude cases without surgery at primary site or unknown

56988

309

Include Surgical Margin as negative

54611

2377

Exclude cases died within 90 day after surgery

54558

53

Exclude missing outcome

53909

649

Include ERPR as 0 1

46641

7268

Exclude cases with bilateral mastectomy

34444

12197