Table 3. Mortality in relation to the first symptom.

	Univariable		Multivariablea
First symptom	Proportional hazard (CI)	P-value	Proportional hazard (CI)	P-value
Rectal bleeding	0.56 (0.41, 0.79)	0.001	0.57 (0.41, 0.81)	0.001
Abdominal pain	1.3 (0.93, 1.7)	0.14	1.3 (0.95, 1.8)	0.096
Diarrhoea	0.93 (0.67, 1.3)	0.70	1.1 (0.77, 1.5)	0.63
Constipation	1.3 (0.84, 1.9)	0.27	1.1 (0.79, 1.8)	0.60
Loss of weight	1.5 (0.94, 2.4)	0.092	1.5 (0.91, 2.3)	0.11
Mild anaemia	1.5 (0.98, 2.3)	0.064	1.8 (1.1, 2.7)	0.010
Severe anaemia	0.98 (0.65, 1.5)	0.93	0.79 (0.51, 1.2)	0.30

CI, confidence interval.

^aOther variables in model: age, emergency admission status, sex, and site of tumour.