Table 4

A comparison between the LR⁺RT^- and LR^-RT^- subgroups

Factor

LR⁺RT^-

LR^-RT^-

P value

ER status, number

Negative

8

6

Positive

14

27

0.21^a

Median age, years

All

53

61

0.02^b

ER^- subgroup

59.5

54

0.90

ER⁺ subgroup

50.5

62

0.02

Histological grade, number

1

4

13

2

10

9

3

5

8

0.19^a

Median tumor size, millimeters

15

14

0.67^b

Only cases from inclusion 1 are included. ^aFisher exact test. ^bWilcoxon rank sum test. ER, = estrogen receptor; LR^-RT^- = no local recurrence, no radiotherapy given; LR⁺RT^- = local recurrence developed, no radiotherapy given.

Niméus-Malmström et al. Breast Cancer Research 2008 10:R34   doi:10.1186/bcr1997