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. 2009 Jul 28;339:b2968. doi: 10.1136/bmj.b2968

Table 3.

 Distribution of cancers stage IB or worse according to screening classification. Figures are numbers (percentages) of women

Screening category Age (years) at diagnosis
20-29 30-39 40-49 50-59 60-69 Total
Screen detected:
 First screen 25 (15) 131 (20) 115 (18) 87 (16) 86 (19) 444 (18)
 Previously screened 33 (19) 121 (18) 93 (15) 47 (9) 20 (4) 314 (13)
Interval 54 (31) 196 (29) 143 (23) 127 (24) 106 (23) 626 (26)
After abnormal cytology 41 (24) 115 (17) 126 (20) 74 (14) 45 (10) 401 (16)
Never screened or lapsed 19 (11) 102 (15) 148 (24) 193 (37) 203 (44) 665 (27)
Total 172 (100) 665 (100) 625 (100) 528 (100) 460 (100) 2450 (100)