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 7 Estimates of coefficients of patient choice of participation or opt-out (Stage-two 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	0.09 (-0.03, 0.21)	0.09 (-0.01, 0.19)	0.07 (-0.07, 0.20)	0.08 (-0.01, 0.18)	0.08 (0.01, 0.16)	0.00 (-0.07, 0.07)	0.00 (-0.06, 0.06)
Scope	-0.14 (-0.27, -0.01)	-0.14 (-0.25, -0.03)	-0.23 (-0.37, -0.09)	-0.10 (-0.20, 0.00)	-0.10 (-0.01, -0.19)	-0.02 (-0.08, 0.05)	-0.02 (-0.08, 0.04)
CT	0.04 (-0.09, 0.17)	0.04 (-0.08, 0.15)	0.13 (-0.01, 0.27)	0.02 (-0.08, 0.12)	0.02 (-0.07, 0.11)	0.05 (-0.02, 0.12)	0.05 (-0.02, 0.12)
No Pain (ref = mild pain)	0.03 (-0.04, 0.11)	0.03 (-0.02, 0.09)	0.03 (-0.05, 0.11)	0.03 (-0.03, 0.09)	0.03 (-0.02, 0.07)	0.01 (-0.03, 0.05)	0.01 (-0.02, 0.04)
Preparation (ref = Enema/Lax)
None	0.23 (0.13, 0.33)	0.23 (0.15, 0.31)	0.20 (0.09, 0.31)	0.17 (0.09, 0.25)	0.17 (0.11, 0.24)	0.09 (0.03, 0.14)	0.09 (0.04, 0.13)
Special Diet	-0.13 (-0.24, -0.02)	-0.13 (-0.24, -0.02)	-0.17 (-0.29, -0.05)	-0.09 (-0.18, -0.01)	-0.09 (-0.17, -0.01)	-0.02 (-0.08, 0.04)	-0.02 (-0.08, 0.04)
Specificity (ref = 50%)
100%	0.07 (-0.03, 0.17)	0.07 (-0.02, 0.17)	0.16 (0.05, 0.27)	0.06 (-0.02, 0.14)	0.06 (-0.01, 0.13)	0.01 (-0.05, 0.06)	0.01 (-0.04, 0.06)
80%	-0.09 (-0.19, 0.02)	-0.09 (-0.17, -0.01)	-0.17 (-0.28, -0.05)	-0.06 (-0.22, 0.09)	-0.06 (-0.13, -0.01)	0.03 (-0.03, 0.09)	0.03 (-0.02, 0.07)
Sensitivity (ref = 40%)
90%	0.19 (0.09, 0.29)	0.19 (0.10, 0.27)	0.22 (0.11, 0.33)	0.14 (0.06, 0.22)	0.14 (0.07, 0.0.21)	0.13 (0.08, 0.18)	0.13 (0.08, 0.18)
70%	0.10 (-0.01, 0.21)	0.10 (0.01, 0.20)	0.13 (0.01, 0.25)	0.08 (-0.01, 0.16)	0.08 (0.01, 0.15)	0.01 (-0.05, 0.07)	0.01 (-0.04, 0.06)
Cost (ref=$10)
$50	0.16 (-0.03, 0.35)	0.16 (0.04, 0.28)	0.25 (0.05, 0.45)	0.12 (-0.03, 0.27)	0.12 (0.02, 0.21)	-0.05 (-0.16, 0.05)	-0.05 (-0.12, 0.02)
$250	-0.08 (-0.28, 0.12)	-0.08 (-0.27, 0.11)	-0.26 (-0.48, -0.04)	-0.07 (-0.22, 0.09)	-0.07 (-0.22, 0.09)	-0.10 (-0.20, 0.01)	-0.10 (-0.22, 0.02)
$500	-0.32 (-0.54, -0.09)	-0.32 (-0.52, -0.11)	-0.28 (-0.63, -0.04)	-0.25 (-0.43, -0.08)	-0.25 (-0.42, -0.09)	-0.33 (-0.45,- 0.21)	-0.33 (-0.45, -0.21)

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ISSN: 1471-2288

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