Research Article

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

Table 6

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

MSEMSEMSE
MeanAVBMeanAVBMeanAVB

Count process
502.66650.06650.00542.58990.01010.00102.56230.03770.0024
2002.61040.01040.00062.59420.00580.00052.58190.01810.0008
5002.60100.00100.00042.60270.00270.00042.59680.00320.0004
50-0.58380.01620.0003-0.60400.0040<0.0001-0.61400.01400.0002
200-0.59290.00710.0001-0.59800.0020<0.0001-0.60820.00820.0001
500-0.60480.0048<0.0001-0.60120.0012<0.0001-0.60320.0032<0.0001
50-0.41150.01150.0002-0.40470.00470.0001-0.41130.01130.0002
200-0.40140.0014<0.0001-0.40150.0015<0.0001-0.39110.00890.0001
500-0.39940.0006<0.0001-0.40510.0051<0.0001-0.40270.0027<0.0001
NBP501.04450.04450.00205.39940.39940.1596151.34851.34851.8185
2001.01270.01270.00034.99960.00040.0001149.21780.78220.6120
5000.99920.0008<0.00015.09140.09140.0084150.23600.23600.0557
500.14910.04910.00240.12340.02340.00060.09940.0006<0.0001
2000.14290.04290.00180.11620.01620.00030.09420.0058<0.0001
5000.11570.01570.00030.10660.00660.00010.09700.0030<0.0001
Ordinal process
500.62870.02870.00080.63430.03430.00120.58900.01100.0001
2000.61830.01830.00030.63250.03250.00110.58830.01170.0001
5000.60040.0004<0.00010.61280.01280.00020.59720.0028<0.0001
500.12910.02910.00080.08540.01460.00020.08870.01130.0001
2000.13930.03930.00150.12480.02480.00060.09870.0013<0.0001
5000.11120.01120.00030.10010.00010.00020.09220.00780.0003
50-0.80010.19990.0400-0.92520.07480.0056-0.90350.09650.0093
200-0.86490.13510.0183-0.91480.08520.0073-0.90720.09280.0086
500-0.94510.05490.0030-0.99890.0011<0.0001-0.97040.02960.0009
500.83830.16170.02610.84270.15730.02470.86080.13920.0194
2001.18210.18210.03320.89550.10450.01090.83120.16880.0285
5000.99850.0015<0.00010.94240.05760.00330.98220.01780.0003
501.35520.05520.00311.38160.08160.00671.39110.09110.0083
2001.39400.09400.00891.39350.09350.00881.39250.09250.0086
5001.29040.00960.00011.35950.05950.00351.30130.0013<0.0001
500.43830.03830.00150.41710.01710.00030.42760.02760.0008
2000.41350.01350.00020.42530.02530.00070.43270.03270.0011
5000.42830.02830.00080.42180.02180.00050.41650.01650.0003

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