An empirical comparison of methods for analyzing correlated data from a discrete choice survey to elicit patient preference for colorectal cancer screening

Cheng, Ji; Pullenayegum, Eleanor; Marshall, Deborah A; Marshall, John K; Thabane, Lehana

doi:10.1186/1471-2288-12-15

Table 6 Estimates of coefficients of patient choice of participation or opt-out (Two-point outcome from stage-two)

From: An empirical comparison of methods for analyzing correlated data from a discrete choice survey to elicit patient preference for colorectal cancer screening

				Two-point outcome
		Logistic Model				Probit Model
	Simple SE	Robust SE	Random-effects	GEE	Simple SE	Robust SE	Random-effects	GEE
Process (ref = Enema/X-ray)
Stool	0.00 (-0.11, 0.11)	0.00 (-0.10, 0.09)	-0.13 (-0.34, 0.08)	-0.04 (-0.10, 0.03)	0.00 (-0.07, 0.07)	0.00 (-0.06, 0.06)	-0.08 (-0.19, 0.04)	-0.02 (-0.06, 0.02)
Scope	-0.02 (-0.14, 0.09)	-0.02 (-0.13, 0.08)	-0.20 (-0.42, 0.01)	-0.06 (-0.13, 0.01)	-0.01 (-0.08, 0.06)	-0.01 (-0.08, 0.05)	-0.10 (-0.22, 0.02)	-0.04 (-0.08, 0.01)
CT	0.08 (-0.03, 0.20)	0.08 (-0.03, 0.20)	0.62 (0.40, 0.85)	0.18 (0.11, 0.25)	0.05 (-0.02, 0.12)	0.05 (-0.02, 0.12)	0.35 (0.22, 0.47)	0.11 (0.07, 0.15)
No Pain (ref = mild pain)	0.01 (-0.05, 0.08)	0.01 (-0.04, 0.07)	0.04 (-0.09, 0.16)	0.01 (-0.03, 0.05)	0.01 (-0.03, 0.05)	0.01 (-0.02, 0.04)	0.02 (-0.05, 0.09)	0.01 (-0.02, 0.03)
Preparation (ref = Enema/Lax)
None	0.15 (0.06, 0.24)	0.15 (0.07, 0.22)	0.25 (0.09, 0.42)	0.08 (0.03, 0.14)	0.09 (0.03, 0.14)	0.09 (0.04, 0.13)	0.14 (0.04, 0.23)	0.05 (0.02, 0.08)
Special Diet	-0.03 (-0.13, 0.06)	-0.03 (-0.13, 0.07)	-0.01 (-0.20, 0.17)	-0.01 (-0.07, 0.05)	-0.02 (-0.08, 0.04)	-0.02 (-0.07, 0.04)	-0.01 (-0.11, 0.09)	-0.01 (-0.04, 0.03)
Specificity (ref = 50%)
100%	0.01 (-0.08, 0.10)	0.01 (-0.07, 0.09)	0.34 (0.17, 0.51)	0.10 (0.04, 0.15)	0..01 (-0.05, 0.07)	0.01 (-0.04, 0.06)	0.19 (0.09, 0.29)	0.01 (0.02, 0.09)
80%	0.04 (-0.05, 0.13)	0.04 (-0.03, 0.11)	0.08 (-0.09, 0.25)	0.02 (-0.03, 0.08)	0.02 (-0.03, 0.08)	0.03 (-0.02, 0.07)	0.05 (-0.05, 0.14)	0.01 (-0.02, 0.05)
Sensitivity (ref = 40%)
90%	0.21 (0.12, 0.30)	0.21 (0.13, 0.29)	0.71 (0.53, 0.89)	0.21 (0.16, 0.27)	0.13 (0.07, 0.18)	0.13 (0.08, 0.18)	0.40 (0.31, 0.50)	0.13 (0.10, 0.16)
70%	0.01 (-0.08, 0.11)	0.01 (-0.07, 0.09)	0.04 (-0.14, 0.22)	0.01 (-0.04, 0.07)	0.01 (-0.05, 0.07)	0.01 (-0.04, 0.06)	0.03 (-0.07, 0.13)	0.01 (-0.03, 0.04)
Cost (ref = $10)
$50	-0.09 (-0.26, 0.08)	-0.09 (-0.21, 0.02)	-0.40 (-0.71, -0.08)	-0.12 (-0.24, -0.02)	-0.05 (-0.16, 0.05)	-0.05 (-0.12, 0.01)	-0.21 (-0.39, -0.04)	-0.07 (-0.13, -0.01)
$250	-0.16 (-0.36, 0.02)	-0.16 (-0.36, 0.04)	-1.21 (-1.56, -0.86)	-0.36 (-0.47, -0.25)	-0.10 (-0.20, 0.01)	-0.09 (-0.22, 0.02)	-0.67 (-0.87, -0.48)	-0.22 (-0.13, -0.01)
$500	-0.54 (-0.74, -0.34)	-0.54 (-0.74, -0.34)	-1.69 (-2.08, -1.30)	-0.53 (-0.65, -0.41)	-0.33 (-0.45, -0.21)	-0.33 (-0.45, -0.21)	-0.95 (-1.16, -0.73)	-0.32 (-0.40, -0.25)

Back to article page

ISSN: 1471-2288

Contact us

General enquiries: journalsubmissions@springernature.com

BMC Medical Research Methodology

Contact us