From: The distribution of insertionally polymorphic endogenous retroviruses in breast cancer patients and cancer-free controls
Observed band (bp)a
Casesb
Controlsb
# Positive
Frequency
χ2
p-value
4600
25
1.00
22
0.88
3.19
0.07
3700
10
0.40
11
0.44
0.08
0.78
3200
1
0.04
4
0.16
2.00
1500
23
0.92
2.08
0.15
1470
8
0.32
5
0.20
0.93
0.33