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Table 4 Estimates of coefficients of patient choice between Test A and Test B (Two-point outcome from stage-one)

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 0.27 (0.16, 0.37) 0.27 (0.19, 0.35) 0.27 (0.16, 0.37) 0.27 (0.16, 0.37) 0.16 (0.10, 0.23) 0.16 (0.12, 0.21) 0.16 (0.10, 0.23) 0.16 (0.10, 0.23)
   Scope -0.20(-0.31,-0.09) -0.20(-0.27,-0.13) -0.20(-0.31,-0.09) -0.20(-0.31,-0.09) -0.12(-0.19,-0.05) -0.12(-0.17,-0.08) -0.12(-0.19,-0.05) -0.12(-0.19,-0.05)
   CT -0.13(-0.24,-0.03) -0.13(-0.23,-0.04) -0.13(-0.24,-0.03) -0.13(-0.24,-0.03) -0.08(-0.15,-0.02) -0.08(-0.14,-0.02) -0.08(-0.15,-0.02) -0.08(-0.15,-0.02)
No Pain (ref = mild pain) 0.04(-0.03, 0.10) 0.04(-0.01, 0.08) 0.04(-0.03, 0.10) 0.04(-0.03, 0.10) 0.02(-0.01, 0.06) 0.02(-0.001, 0.05) 0.02(-0.01, 0.06) 0.02(-0.01, 0.06)
Preparation (ref = Enema/Lax)         
   None 0.17 (0.09, 0.25) 0.17 (0.11, 0.23) 0.17 (0.09, 0.25) 0.17 (0.09, 0.25) 0.10 (0.05, 0.16) 0.10 (0.07, 0.14) 0.10 (0.05, 0.16) 0.10 (0.05, 0.16)
   Special Diet -0.17(-0.26,-0.09) -0.17(-0.24,-0.11) -0.17(-0.26, -0.09) -0.17 (-0.26, -0.09) -0.11 (-0.16, -0.05) -0.11 (-0.14, -0.07) -0.11 (-0.16, -0.05) -0.11 (-0.16, -0.05)
Specificity (ref = 50%)         
   100% 0.14 (0.05, 0.22) 0.14 (0.06, 0.21) 0.14 (0.05, 0.22) 0.14 (0.05, 0.22) 0.09 (0.03, 0.14) 0.09 (0.04, 0.13) 0.09 (0.03, 0.14) 0.09 (0.03, 0.14)
   80% -0.26 (-0.35, -0.18) -0.26 (-0.33, -0.20) -0.26 (-0.35, -0.18) -0.26 (-0.35, -0.18) -0.17 (-0.22, -0.11) -0.17 (-0.21, -0.12) -0.17 (-0.22, -0.11) -0.17 (-0.22, -0.11)
Sensitivity (ref = 40%)         
   90% -0.07 (-0.15, 0.01) -0.07 (-0.14, 0.01) -0.07 (-0.15, 0.01) -0.07 (-0.15, 0.01) -0.04 (-0.09, 0.01) -0.04 (-0.08, 0.01) -0.04 (-0.09, 0.01) -0.04 (-0.09, 0.01)
   70% 0.24 (0.15, 0.33) 0.24 (0.15, 0.33) 0.24 (0.15, 0.33) 0.24 (0.15, 0.33) 0.15 (0.03, 0.14) 0.15 (0.10, 0.20) 0.15 (0.03, 0.14) 0.15 (0.03, 0.14)
Cost (ref = $10)         
   $50 0.63 (0.47, 0.79) 0.63 (0.0.52, 0.74) 0.63 (0.47, 0.79) 0.63 (0.47, 0.79) 0.39 (0.29, 0.49) 0.39 (0.32, 0.46) 0.39 (0.29, 0.49) 0.39 (0.29, 0.49)
   $250 0.17 (0.01, 0.33) 0.17 (0.07, 0.28) 0.17 (0.01, 0.33) 0.17 (0.01, 0.33) 0.10 (0.01, 0.20) 0.10 (0.04, 0.17) 0.10 (0.01, 0.20) 0.10 (0.01, 0.20)
   $500 0.44 (0.24, 0.63) 0.44 (0.30, 0.58) 0.44 (0.24, 0.63) 0.44 (0.24, 0.63) 0.27 (0.15, 0.39) 0.27 (0.19, 0.36) 0.27 (0.15, 0.39) 0.27(0.15, 0.39)
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BMC Medical Research Methodology

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