Table 2

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


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

* N = 1525

** 9 missing NAF age

Baltzell et al. BMC Cancer 2008 8:75   doi:10.1186/1471-2407-8-75