Research Article

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

Table 7

Simulation study results with 0.8 correlation between the random intercepts and normal distribution for the random intercept of the ordinal outcome.

MSEMSEMSE
MeanAVBMeanAVBMeanAVB

Count process
502.64220.04220.00272.62200.02200.00142.62500.02500.0016
2002.58050.01950.00082.61400.01400.00062.60760.00760.0005
5002.60190.00190.00042.60240.00240.00042.60380.00380.0004
50-0.58160.01840.0003-0.61130.01130.0001-0.58820.01180.0001
200-0.58410.01590.0003-0.60580.0058<0.0001-0.59300.0070<0.0001
500-0.60060.0006<0.0001-0.60160.0016<0.0001-0.59980.0002<0.0001
50-0.41810.01810.0004-0.39910.0009<0.0001-0.41050.01050.0001
200-0.39500.0050<0.0001-0.40990.00990.0001-0.42200.02200.0005
500-0.38400.01600.0003-0.40700.0070<0.0001-0.40500.0050<0.0001
NBP501.08100.08100.00665.53620.53620.2875148.48481.51522.2959
2001.05170.05170.00285.48300.48300.2334151.04331.04331.0886
5001.00400.0040<0.00015.58550.58550.3428150.86720.86720.7520
500.08630.01370.00020.08710.01290.00020.08300.01700.0003
2000.08920.01080.00010.08310.01690.00030.08610.01390.0002
5000.09870.0013<0.00010.09670.00330.00010.09180.00820.0001
Ordinal process
500.66060.06060.00370.62550.02550.00070.66030.06030.0036
2000.62900.02900.00080.62310.02310.00050.66240.06240.0039
5000.60550.0055<0.00010.60200.0020<0.00010.62940.02940.0009
500.18030.08030.00640.16570.06570.00430.16450.06450.0042
2000.17200.07200.00520.16150.06150.00380.16820.06820.0047
5000.16930.06930.00500.14010.04010.00180.15120.05120.0028
50-0.84950.15050.0227-0.89170.10830.0117-0.91670.08330.0070
200-0.92890.07110.0051-0.89160.10840.0118-0.91950.08050.0065
500-0.95290.04710.0022-0.96760.03240.0011-0.97850.02150.0005
501.37280.37280.13901.35940.35940.12921.21420.21420.0459
2001.17170.17170.02951.19620.19620.03851.09800.09800.0096
5001.10560.10560.01121.02460.02460.00061.00900.00900.0001
501.19660.10340.01071.28180.01820.00041.27960.02040.0004
2001.20190.09810.00971.20150.09850.00971.29080.00920.0001
5001.22600.07400.00551.22220.07780.00611.29230.00770.0001
500.70680.09320.00870.71930.08070.00650.84920.04920.0024
2000.71670.08330.00700.81350.01350.00020.78340.01660.0003
5000.72970.07030.00490.77110.02890.00080.82930.02930.0009

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