Table 4: Correlation between referral guideline criteria and diagnostic outcomes for guideline compliant TWR referrals.

Criteria

CRC/HGD

Benign/Non-CRC Malignancies*

P-Value

CRC

HGD

Weight loss and abdominal pain (age > 40)

1

0

2

0.2882

Per rectal bleeding (age > 50)

8

1

98

0.4107

IDA and/or CIBH (age > 60)

17

3

195

0.1479

Positive FOB

0

0

2

1.0000

Abdominal/Rectal Mass

4

0

11

0.0619

Per rectal bleeding / abdominal pain or CIBH or weight loss or IDA (age < 50)

0

0

0

1.0000

*Patients who declined investigation, or were not suitable for investigation are not included. CRC = Colorectal cancer; HGD = High grade dysplasia; IDA = Iron deficiency anaemia; CIBH = change in bowel habit.