Table 3. Results of multivariate analysis (ANOVA) of the association of different patient characteristics and colonoscopy outcome to average FOBT Hb content among subjects with adenoma.

Source	df	F	P-value
Model	12	6.77	0.000
Age (48–54, 55–59, 60–64, 65–69, 70–76 years)	4	2.34	0.05
Gender (male vs female)	1	0.35	0.55
Largest adenoma size (<1, 1–2, >2 cm)	2	19.84	0.000
Presence of adenoma with severe dysplasia	1	0.60	0.43
Presence of adenoma with villous component	1	0.30	0.58
Adenoma localisation (left vs right colon)	1	6.65	0.01
Presence of haemorroids	1	0.07	0.79
Presence of diverticula	1	0.59	0.44