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 5 Estimates of coefficients of patient choice of Test A and Test B (Stage-one from three-point outcome)

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

			Three-point of outcome
			Nominal			Bivariate
	MNL Simple SE	MNL Robust SE	MNL Random-effects	MNP Simple SE	MNP Robust SE	Bivariate probit Simple SE	Bivariate probit Robust SE
Process (ref = Enema/X-ray)
Stool	0.24 (0.11, 0.36)	0.24 (0.14, 0.33)	0.23 (0.09, 0.36)	0.18 (0.09, 0.28)	0.18 (0.11, 0.26)	0.16 (0.10, 0.23)	0.16 (0.12, 0.21)
Scope	-0.25 (-0.38, -0.13)	-0.25 (-0.34, -0.17)	-0.29 (-0.42, -0.15)	-0.19 (-0.29, -0.09)	-0.19 (-0.26, -0.11)	-0.12 (-0.18, -0.05)	-0.12 (-0.16, -0.08)
CT	-0.14 (-0.27, -0.01)	-0.14 (-0.25, -0.02)	-0.13 (-0.27, -0.01)	-0.10 (-0.20, -0.001)	-0.10 (-0.19, -0.01)	-0.08 (-0.15, -0.02)	-0.08(-0.14, -0.01)
No Pain (ref = mild pain)	0.04 (-0.03, 0.11)	0.04 (-0.01, 0.09)	0.04 (-0.04, 0.12)	0.04 (-0.01, 0.09)	0.03 (-0.01, 0.07)	0.02 (-0.01, 0.06)	0.02 (-0.01, 0.05)
Preparation (ref = Enema/Lax)
None	0.18 (0.09, 0.28)	0.18 (0.11, 0.26)	0.18 (0.08, 0.28)	0.14 (0.07, 0.22)	0.14 (0.09, 0.20)	0.10 (0.05, 0.16)	0.10 (0.07, 0.14)
Special Diet	-0.21 (-0.32, -0.11)	-0.21 (-0.29, -0.14)	-0.24 (-0.35, -0.13)	-0.16 (-0.25, -0.08)	-0.16 (-0.22, -0.10)	-0.11 (-0.16, -0.05)	-0.11 (-0.14, -0.07)
Specificity (ref = 50%)
100%	0.14 (0.04, 0.25)	0.14 (0.04, 0.25)	0.15 (0.04, 0.26)	0.11 (0.03, 0.19)	0.11 (0.03, 0.19)	0.08 (0.03, 0.14)	0.08 (0.04, 0.13)
80%	-0.29 (-0.39, -0.19)	-0.29 (-0.37, -0.21)	-0.33 (-0.44, -0.23)	-0.22 (-0.30, -0.14)	-0.22 (-0.29, -0.16)	-0.17 (-0.22, -0.11)	-0.17 (-0.21, -0.12)
Sensitivity (ref = 40%)
90%	-0.07 (-0.17, 0.03)	-0.07 (-0.14, 0.01)	-0.07 (-0.17, 0.04)	-0.04 (-0.12, 0.03)	-0.04 (-0.10, 0.01)	-0.04 (-0.10, 0.02)	-0.04 (-0.08, 0.01)
70%	0.20 (0.09, 0.31)	0.20 (0.10, 0.30)	0.20 (0.08, 0.32)	0.16 (0.07, 0.25)	0.16 (0.09, 0.24)	0.15 (0.09, 0.21)	0.15 (0.10, 0.20)
Cost (ref=$10)
$50	0.59 (0.40, 0.78)	0.59 (0.46, 0.72)	0.66 (0.46, 0.85)	0.45 (0.30, 0.60)	0.45 (0.35, 0.55)	0.39 (0.29, 0.49)	0.39 (0.32, 0.46)
$250	0.15 (-0.04, 0.35)	0.15 (0.02, 0.29)	0.14 (-0.06, 0.35)	0.11 (-0.05, 0.26)	0.11 (-0.01, 0.21)	0.10 (0.00, 0.20)	0.10 (0.04, 0.17)
$500	0.52 (0.28, 0.76)	0.52 (0.34, 0.70)	0.57 (0.32, 0.83)	0.39 (0.20, 0.57)	0.39 (0.25, 0.52)	0.27 (0.15, 0.39)	0.27 (0.19, 0.36)

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ISSN: 1471-2288

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