Research Article

Longitudinal Joint Modelling of Ordinal and Overdispersed Count Outcomes: A Bridge Distribution for the Ordinal Random Intercept

Table 5

Simulation study results with 0.4 correlation between the random intercepts and normal distribution for the random intercept of the ordinal outcome.

MeanAVBMSEMeanAVBMSEMeanAVBMSE

Count process
502.57940.02060.00042.58070.01930.00132.57030.02970.0018
2002.61110.01110.00012.59260.00740.00052.58110.01890.0008
5002.60120.0012<0.00012.60950.00950.00052.59760.00240.0004
50-0.57500.02500.0006-0.59420.0058<0.0001-0.58160.01840.0003
200-0.58650.01350.0002-0.59350.0065<0.0001-0.58940.01060.0001
500-0.60010.0001<0.0001-0.60070.0007<0.0001-0.61050.01050.0001
50-0.39980.0002<0.0001-0.39490.00510.0001-0.39080.00920.0001
200-0.40980.00980.0001-0.40100.0010<0.0001-0.39180.00820.0001
500-0.40580.0058<0.0001-0.39920.0008<0.0001-0.39270.00730.0001
NBP501.10840.10840.01185.62020.62020.3847151.69141.69142.8609
2001.06430.06430.00415.23250.23250.0542151.65601.65602.7425
5001.00300.0030<0.00015.17300.17300.0299150.20800.20800.0433
500.08570.01430.00020.08770.01230.00020.08430.01570.0003
2000.08640.01360.00020.08200.01800.00030.08130.01870.0004
5000.09350.0065<0.00010.09730.0027<0.00010.09150.00850.0001
Ordinal process
500.63830.03830.00150.64990.04990.00250.62270.02270.0005
2000.61360.01360.00020.63510.03510.00120.61480.01480.0002
5000.60110.0011<0.00010.61230.01230.00020.60030.0003<0.0001
500.17310.07310.00530.13180.03180.00100.13710.03710.0014
2000.13180.03180.00100.15730.05730.00330.12120.02120.0005
5000.12040.02040.00040.13970.03970.00180.11730.01730.0005
50-0.84590.15410.0237-0.81260.18740.0351-0.88780.11220.0126
200-0.92020.07980.0064-0.83580.16420.0270-0.89970.10030.0101
500-0.96380.03620.0013-0.92530.07470.0056-0.94270.05730.0033
501.37810.37810.14301.22850.22850.05221.26130.26130.0683
2001.16990.16990.02891.07160.07160.00511.05120.05120.0026
5001.08520.08520.00731.03780.03780.00151.06260.06260.0039
501.19890.10110.01021.32930.02930.00091.27410.02590.0007
2001.21280.08720.00761.31990.01990.00041.28830.01170.0002
5001.23150.06850.00471.31140.01140.00011.29140.00860.0001
500.43370.03370.00110.41080.01080.00010.41120.01120.0001
2000.40610.0061<0.00010.44000.04000.00160.41650.01650.0003
5000.46220.06220.00390.46210.06210.00390.44790.04790.0023

NBP: negative binomial parameter; AVB: the absolute value of biases; MSE: mean square error.