Skip to main content

Table 2 Comparison between women excluded from the final analysis versus those included in the final analysis, Sartorius Cohort 1970–1991.

From: Epithelial cells in nipple aspirate fluid and subsequent breast cancer risk: A historic prospective study

 

Excluded from Analysis

Included in Analysis

 

Basic Stats

N = 1534

N = 946

ANOVA

Age at NAF visit:

   

Mean

43.9 *

42.6

 

Median

42

41

 

Std Err

0.39

0.42

 

Min-max

16–89

16–87

 
   

p = 0.04

Age at breast cancer diagnosis:

   

N

81 **

93

 

Mean

62.0

60.8

 

Median

62

62

 

Std Err

1.5

1.27

 

Min-max

30–89

34–86

 
   

p = 0.54

Breast cancer:

n (%)

n (%)

 
 

90 (6%)

93 (10%)

Chi Square

   

p <0.001

NAF Cytology:

n (%)

n (%)

 

No fluid

929 (61%)

714 (75%)

 

Insufficient specimen

45 (3%)

19 (2%)

 

Normal

232 (15%)

89 (9%)

 

Hyperplasia

234 (15%)

97 (10%)

 

Atypia

81 (5%)

27 (3%)

 

[Unable to classify]

13 (1%)

  
   

p <0.001

  1. * N = 1525
  2. ** 9 missing NAF age