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Table 2 Simulation results for six treatment effect (TE)/visit process (VP) scenarios.

From: A coarsened multinomial regression model for perinatal mother to child transmission of HIV

 

Bias

MSE

CP

Power

Scenario

A1

A2/A3

A1

A2/A3

A1

A2/A3

A1

A2/A3

TE1/VP1 (β 11 = -0.55, β 21 = β 2|1 - ,1 = -0.54)

L-CUM

0.013

0.045

0.069

0.030

0.948

0.943

0.518

0.845

CM-CUM

0.027

0.048

0.068

0.027

0.948

0.939

0.499

0.882

L-COND

-0.015

0.107

0.077

0.077

0.959

0.914

0.539

0.439

CM-COND

-0.007

0.106

0.072

0.072

0.956

0.901

0.541

0.461

TE2/VP1 (β 11 = -0.55, β 21 = β 2|1 - ,1 = 0)

L-CUM

0.173

-0.020

0.096

0.022

0.879

0.952

0.309

 

CM-CUM

0.168

-0.009

0.094

0.020

0.873

0.952

0.339

 

L-COND

0.098

0.004

0.083

0.050

0.938

0.956

0.398

 

CM-COND

0.101

0.006

0.079

0.046

0.941

0.952

0.405

 

TE3/VP1 (β 11 = -0.02, β 21 = β 2|1 - ,1 = -0.38)

L-CUM

-0.078

0.055

0.058

0.029

0.952

0.931

0.057

0.517

CM-CUM

-0.064

0.049

0.054

0.025

0.954

0.933

0.056

0.605

L-COND

-0.050

0.064

0.062

0.059

0.946

0.941

0.062

0.263

CM-COND

-0.042

0.063

0.058

0.055

0.944

0.944

0.057

0.264

TE4/VP1 (β 11 = 0.27, β 21 = β 2|1 - ,1 = 0.27)

L-CUM

-0.123

0.059

0.065

0.028

0.921

0.936

0.096

0.271

CM-CUM

-0.105

0.049

0.057

0.023

0.931

0.942

0.111

0.307

L-COND

-0.043

0.034

0.058

0.060

0.953

0.937

0.160

0.173

CM-COND

-0.038

0.033

0.055

0.056

0.954

0.936

0.186

0.187

TE4/VP2

L-CUM

-0.110

0.116

0.064

0.045

0.927

0.898

0.103

0.138

CM-CUM

-0.096

0.043

0.059

0.032

0.927

0.940

0.128

0.261

L-COND

-0.073

0.041

0.061

0.084

0.941

0.949

0.138

0.123

CM-COND

-0.066

0.042

0.054

0.078

0.946

0.945

0.146

0.134

TE4/VP3

L-CUM

-0.124

0.192

0.113

0.105

0.923

0.890

0.068

0.064

CM-CUM

-0.088

0.017

0.097

0.058

0.939

0.954

0.096

0.193

L-COND

-0.054

-0.009

0.099

0.292

0.944

0.967

0.095

0.077

CM-COND

-0.040

0.002

0.087

0.211

0.946

0.964

0.102

0.086

  1. TE scenarios are defined by β 11, β 21, and β 2|1 - ,1, which represent the true log odds ratios for in utero transmission (A1), perinatal transmission (A2), and intrapartum transmission (A3), respectively, comparing treatment versus control (see Appendix A). VP scenarios are defined such that the amount of missing data increases from VP1 to VP3 (see Appendix B). L-CUM = logistic model, cumulative probabilities; CM-CUM = coarsened multinomial model, cumulative probabilities; L-COND = logistic model, conditional probabilities; CM-COND = coarsened multinomial model, conditional probabilities. Results for estimators of treatment effect on perinatal transmission and intrapartum transmission are combined under the heading A2/A3.