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.
| | | | | Mean | AVB | MSE | Mean | AVB | MSE | Mean | AVB | MSE |
| Count process | | | | | | | | | | | | 50 | 2.5794 | 0.0206 | 0.0004 | 2.5807 | 0.0193 | 0.0013 | 2.5703 | 0.0297 | 0.0018 | 200 | 2.6111 | 0.0111 | 0.0001 | 2.5926 | 0.0074 | 0.0005 | 2.5811 | 0.0189 | 0.0008 | 500 | 2.6012 | 0.0012 | <0.0001 | 2.6095 | 0.0095 | 0.0005 | 2.5976 | 0.0024 | 0.0004 | | 50 | -0.5750 | 0.0250 | 0.0006 | -0.5942 | 0.0058 | <0.0001 | -0.5816 | 0.0184 | 0.0003 | 200 | -0.5865 | 0.0135 | 0.0002 | -0.5935 | 0.0065 | <0.0001 | -0.5894 | 0.0106 | 0.0001 | 500 | -0.6001 | 0.0001 | <0.0001 | -0.6007 | 0.0007 | <0.0001 | -0.6105 | 0.0105 | 0.0001 | | 50 | -0.3998 | 0.0002 | <0.0001 | -0.3949 | 0.0051 | 0.0001 | -0.3908 | 0.0092 | 0.0001 | 200 | -0.4098 | 0.0098 | 0.0001 | -0.4010 | 0.0010 | <0.0001 | -0.3918 | 0.0082 | 0.0001 | 500 | -0.4058 | 0.0058 | <0.0001 | -0.3992 | 0.0008 | <0.0001 | -0.3927 | 0.0073 | 0.0001 | NBP | 50 | 1.1084 | 0.1084 | 0.0118 | 5.6202 | 0.6202 | 0.3847 | 151.6914 | 1.6914 | 2.8609 | 200 | 1.0643 | 0.0643 | 0.0041 | 5.2325 | 0.2325 | 0.0542 | 151.6560 | 1.6560 | 2.7425 | 500 | 1.0030 | 0.0030 | <0.0001 | 5.1730 | 0.1730 | 0.0299 | 150.2080 | 0.2080 | 0.0433 | | 50 | 0.0857 | 0.0143 | 0.0002 | 0.0877 | 0.0123 | 0.0002 | 0.0843 | 0.0157 | 0.0003 | 200 | 0.0864 | 0.0136 | 0.0002 | 0.0820 | 0.0180 | 0.0003 | 0.0813 | 0.0187 | 0.0004 | 500 | 0.0935 | 0.0065 | <0.0001 | 0.0973 | 0.0027 | <0.0001 | 0.0915 | 0.0085 | 0.0001 | Ordinal process | | | | | | | | | | | | 50 | 0.6383 | 0.0383 | 0.0015 | 0.6499 | 0.0499 | 0.0025 | 0.6227 | 0.0227 | 0.0005 | 200 | 0.6136 | 0.0136 | 0.0002 | 0.6351 | 0.0351 | 0.0012 | 0.6148 | 0.0148 | 0.0002 | 500 | 0.6011 | 0.0011 | <0.0001 | 0.6123 | 0.0123 | 0.0002 | 0.6003 | 0.0003 | <0.0001 | | 50 | 0.1731 | 0.0731 | 0.0053 | 0.1318 | 0.0318 | 0.0010 | 0.1371 | 0.0371 | 0.0014 | 200 | 0.1318 | 0.0318 | 0.0010 | 0.1573 | 0.0573 | 0.0033 | 0.1212 | 0.0212 | 0.0005 | 500 | 0.1204 | 0.0204 | 0.0004 | 0.1397 | 0.0397 | 0.0018 | 0.1173 | 0.0173 | 0.0005 | | 50 | -0.8459 | 0.1541 | 0.0237 | -0.8126 | 0.1874 | 0.0351 | -0.8878 | 0.1122 | 0.0126 | 200 | -0.9202 | 0.0798 | 0.0064 | -0.8358 | 0.1642 | 0.0270 | -0.8997 | 0.1003 | 0.0101 | 500 | -0.9638 | 0.0362 | 0.0013 | -0.9253 | 0.0747 | 0.0056 | -0.9427 | 0.0573 | 0.0033 | | 50 | 1.3781 | 0.3781 | 0.1430 | 1.2285 | 0.2285 | 0.0522 | 1.2613 | 0.2613 | 0.0683 | 200 | 1.1699 | 0.1699 | 0.0289 | 1.0716 | 0.0716 | 0.0051 | 1.0512 | 0.0512 | 0.0026 | 500 | 1.0852 | 0.0852 | 0.0073 | 1.0378 | 0.0378 | 0.0015 | 1.0626 | 0.0626 | 0.0039 | | 50 | 1.1989 | 0.1011 | 0.0102 | 1.3293 | 0.0293 | 0.0009 | 1.2741 | 0.0259 | 0.0007 | 200 | 1.2128 | 0.0872 | 0.0076 | 1.3199 | 0.0199 | 0.0004 | 1.2883 | 0.0117 | 0.0002 | 500 | 1.2315 | 0.0685 | 0.0047 | 1.3114 | 0.0114 | 0.0001 | 1.2914 | 0.0086 | 0.0001 | | 50 | 0.4337 | 0.0337 | 0.0011 | 0.4108 | 0.0108 | 0.0001 | 0.4112 | 0.0112 | 0.0001 | 200 | 0.4061 | 0.0061 | <0.0001 | 0.4400 | 0.0400 | 0.0016 | 0.4165 | 0.0165 | 0.0003 | 500 | 0.4622 | 0.0622 | 0.0039 | 0.4621 | 0.0621 | 0.0039 | 0.4479 | 0.0479 | 0.0023 |
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NBP: negative binomial parameter; AVB: the absolute value of biases; MSE: mean square error.
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