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Table 4 Inferred case–control frequencies of previously undescribed polymorphic HML-2 proviruses in breast cancer

From: The distribution of insertionally polymorphic endogenous retroviruses in breast cancer patients and cancer-free controls

Observed band (bp)a

Casesb

Controlsb

 

# Positive

Frequency

# 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

0.16

1500

25

1.00

23

0.92

2.08

0.15

1470

8

0.32

5

0.20

0.93

0.33

  1. aBand sizes are based on estimated fragment lengths; each has been indicated by arrow in Figure 2.
  2. bTotal sample size was 50 (n = 25 per group).