Table 4 Comparison of screen- and non-screen-detected colorectal cancer in the postscreening era (2011/12)

From: Temporal trends in mode, site and stage of presentation with the introduction of colorectal cancer screening: a decade of experience from the West of Scotland

 

All patients

Screen detected

Non-screen detected

 
 

n (3343)

%

n (672)

%

n (2671)

%

P -value

Age (years)

⩽50

182

5

1

0

182

7

 

50–74

1925

58

607

90

1318

49

 

⩾75

1229

37

64

10

1165

44

⩽0.001

Unknown

6

0

0

0

6

0

 

Sex

Female

1493

45

246

37

1247

47

 

Male

1843

55

425

63

1418

53

⩽0.001

Unknown

7

0

1

0

6

0

 

Deprivation category

1 (most deprived)

1043

31

192

29

851

32

 

2

790

24

150

22

640

24

 

3

540

16

97

14

443

17

 

4

475

14

115

17

360

14

 

5 (least deprived)

488

15

117

17

371

14

0.002

Unknown

7

0

1

0

6

0

 

Site of tumour

Right colon

1146

34

171

25

975

37

 

Left colon

1139

34

284

42

855

32

 

Rectum

1025

31

214

32

811

30

⩽0.001

Multiple/unknown

33

1

3

0

30

1

 

Management intent

Curative intent

2229

67

600

89

1629

61

 

Palliative procedure

377

11

27

4

350

13

⩽0.001a

Did not undergo procedure

704

21

40

6

664

25

 

Unknown/other

33

1

5

1

28

1

 

Presentation to surgery

Emergency

418

13

12

2

406

15

 

Elective

2199

65

607

90

1592

60

⩽0.001b

Did not undergo procedure

704

21

40

6

664

25

 

Unknown

22

1

13

2

9

0

 

Stage

I

629

19

256

38

373

14

 

II

812

24

164

24

648

24

 

III

778

23

155

23

623

23

 

IV

295

9

24

4

271

10

⩽0.001

Unknown/other

829

25

73

11

756

28

 
  1. aCurative vs palliative resection.
  2. bEmergency vs elective presentation.
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