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. 1998 Aug 8;317(7155):376–379. doi: 10.1136/bmj.317.7155.376

Table 1.

 Observed and computer modelled rates of detection of breast cancer per 1000 women screened

Age First screening
Second screening
Observed Modelled Observed Modelled
50-54 5.5 4.6 NA 3.7
55-59 5.6 5.6 NA 4.0
60-64 7.1 7.6 NA 5.5
All ages 6.0 5.9 4.7 4.6

NA=not available.