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Table 1 Simulation results for the design in Fig. 1: the estimated means, based on 500 replicates, are reported for coefficients in model (4)

From: Time-varying SMART design and data analysis methods for evaluating adaptive intervention effects

Parameter estimation

 

β 12

β 22

β 23

β 32

   
 

(first-stage interventions A 1)

(second-stage interventions for responders A 2R )

(second-stage interventions for non-responders A 2NR )

(time of intervention T 2)

   

True value

0.4

0.5

0.5

2

   

Joint Model

Estimate

0.407

0.503

0.502

1.790

   

MSE

0.011

0.029

0.016

0.147

   

CI%

97.8 %

95.0 %

96.8 %

94.2 %

   

Length of CI

0.478

0.674

0.538

1.447

   

TVMEM

Estimate

0.275

0.503

0.501

4.073

   

MSE

0.026

0.030

0.017

4.400

   

CI%

88.0 %

95.6 %

97.0 %

0.0 %

   

Length of CI

0.484

0.695

0.549

1.436

   
  1. CI%: Coverage probability of the 95 % confidence interval
  2. MSE mean squared error