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Table 1 Mean follow-up between the two groups and relative differences between patients at every stage

From: Prognosis of screen-detected breast cancers: results of a population based study

Stage

Distribution of those exposed to screening

Time of mean follow-up in thoxe exposed to screening (months)

Distribution in non screen-detected

Time of mean follow-up in non-screen-detected (months)

Differences between mean follow-up (months)

I

357

54.13

199

54.01

0.12

II

115

51.39

156

48.49

2.9

III

2

50.58

30

49

1.56

IV

8

32.57

26

36.32

-3.75