Table 2.

Clinical characteristics of people with different screening histories

OverallIntervalScreen-detectedNot offered screeningP
Time since diagnosis (y),a mean (SD)7.7 (2.2)6.6 (2.2)d,e8.6 (1.8)f7.7 (1.9)<0.001
Dukes' stagec0.04
 A68 (26)21 (23)d32 (35)f15 (18)
 B104 (40)37 (41)33 (37)34 (42)
 C84 (32)31 (34)24 (27)29 (36)
 D6 (2)2 (2)1 (1)3 (4)
Surgeryb
 Yes286 (98)95 (99)100 (94)91 (100)
 No7 (2)1 (1)6 (6)0 (0)
Radiotherapyc0.22
 Yes37 (14)16 (18)(e)13 (13)8 (9)
 No238 (86)71 (82)89 (87)78 (91)
Chemotherapyb0.08
 Yes119 (42)43 (47)d34 (33)(f)42 (47)
 No163 (58)48 (53)68 (67)47 (53)
Comorbiditiesa0.20
 Yes208 (70)69 (70)(e)69 (65)70 (77)
 No88 (30)30 (30)35 (37)21 (23)

NOTE: Values are numbers (percentages) unless stated otherwise.

  • aNo missing data.

  • bMissing data <5%.

  • cMissing data >5%. Where there are missing data, the percentage is the valid percentage.

  • dSignificant difference between Interval cancer and Screen-detected cancer groups.

  • eSignificant difference between Interval and Non-screened cancer groups; (e) approaches significance.

  • fSignificant difference between Screen-detected and Non-screened cancer groups; (f) approaches significance.