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Table 1 Descriptive statistics of the screen-detected and interval cancer groups. Percentage in each BI-RADS category are calculated excluding the missing/unknown groups

From: Deep learning networks find unique mammographic differences in previous negative mammograms between interval and screen-detected cancers: a case-case study

  Screen-Detected Group Interval Group P-Value
N 173 182  
Age, years (Standard Deviation) 57.8 (10.9) 56.8 (11.8) 0.28
BMI, kg/m2 (Standard Deviation) 24.9 (4.7) 23.5 (4.3) < 0.0001
Time to Detection (Days) 56.3 (81.4) 239.8 (94.6) < 0.0001
Race:    0.88
 White 127 129  
 African American 3 4  
 Chinese 25 27  
 Filipina 3 3  
 Hispanic 0 2  
 Japanese 5 8  
 Mixed 5 5  
 Other Asian 2 1  
 Other Non-Asian 3 3  
Menopausal status 119 (69%) 123 (68%) 0.69
Family history of breast cancer 47 (23%) 60 (33%) 0.25
Previous history of breast biopsy 55 (32%) 68 (37%) 0.33
BI-RADS Frequency:    0.008
 A: Almost Entirely Fatty 11 (7.8%) 3 (1.8%)  
 B: Scattered Fibroglandularities 50 (35.5%) 33 (19.7%)  
 C: Heterogeneously Dense 61 (43.3%) 78 (46.7%)  
 D: Extremely Dense 19 (13.5%) 53 (31.7%)  
 Missing Data 19 7  
 Unknown 13 8