Table 2.

Factors associated with stated preferences for FOBT, COL and SIG

	COL vs. FOBT	SIG vs. FOBT	COL vs. SIG
Family history (yes vs. no)	1.08 (0.61-1.90)	0.46 (0.17-1.21)	2.36 (0.94-5.93)
Prior CRC test (yes vs. no)a
FOBT	1.01 (0.73-1.39)	0.71 (0.45-1.12)	1.41 (0.91-2.20)
SIG	1.01 (0.93-1.09)	0.58 (0.37-0.93)*	1.73 (1.08-2.75)*
COL	1.04 (0.88-1.23)	1.01 (0.81-1.26)	1.03 (0.88-1.21)
Physician recommendation (yes vs. no)a
FOBT	0.59 (0.34-1.03)	0.68 (0.32-1.47)	0.86 (0.40-1.87)
SIG	1.75 (0.87-3.56)	2.52 (1.09-5.81)*	0.69 (0.32-1.49)
COL	2.28 (1.62-3.22)**	1.78 (1.12-2.83)*	1.28 (0.84-1.96)
Preference for decision making
Doctor-based	Ref	Ref	Ref
Shared	1.24 (0.74-2.09)	1.13 (0.55-2.35)	1.10 (0.54-2.22)
Patient-based	0.89 (0.53-1.49)	1.25 (0.61-2.56)	0.71 (0.35-1.42)
Stage of readinessb	1.33 (1.19-1.49)**	1.34 (1.15-1.57)**	0.99 (0.85-1.16)
Self-efficacy (very confident vs. less confident)
FOBT confidence	0.48 (0.34-0.68)**	0.48 (0.30-0.76)*	1.01 (0.64-1.58)
SIG confidence	1.10 (0.75-1.62)	3.45 (2.03-5.87)**	0.32 (0.19-0.53)**
COL confidence	2.82 (1.92-4.13)**	0.70 (0.42-1.17)	4.03 (2.44-6.66)**
Comparative perceived risk
About average	Ref	Ref	Ref
Less than average	0.83 (0.59-1.16)	0.87 (0.55-1.37)	0.95 (0.61-1.48)
More than average	1.27 (0.84-1.92)	1.01 (0.57-1.80)	1.25 (0.73-2.14)
CRC worry (sometimes/most of the time/all the time vs. rarely/never)	1.96 (1.36-2.84)**	1.71 (1.05-2.78)*	1.15 (0.74-1.79)
Pros of CRC screening	1.62 (1.13-2.33)*	1.04 (0.65-1.66)	1.56 (0.98-2.48)

COL (colonoscopy); CRC (colorectal cancer); FOBT (fecal occult blood test); SIG (sigmoidoscopy).

^*p<0.05

^**p<0.001.

^aRespondents could report having had more than one test and/or having had recommendations for more than one test.

^bRate ratio applies to each one-step increase in stage of change, i.e. for each increase in stage, there is a 33% increase for COL vs. FOBT and a 34% increase for SIG vs. FOBT.