Research Article

Nonlinear Survival Regression Using Artificial Neural Network

Table 2

Results of ANN models for simulated data.

# of MLP ( )MLP ( )MLP ( )MLP ( )MLP ( )MLP ( )MLP ( )
Model*BIC**MSE***BICMSEBICMSEBICMSEBICMSEBICMSEBICMSE

I:
 20%0.2131.0550.2031.1480.2051.2520.2141.3020.2231.4050.2541.3870.2782.235
 30%0.2131.1450.2121.1490.2101.2410.2111.2490.2191.4110.2391.4220.2692.222
 40%0.2121.1340.2171.1630.2091.3210.2091.3920.2281.4330.2491.4730.2832.314
 50%0.2271.2430.2091.1870.2341.4490.2031.2180.2311.4290.2511.5210.2792.543
 60%0.2561.2890.2171.2510.2391.4430.2111.3250.2411.5110.2621.6110.2812.468
 70%0.2811.2590.2261.2630.2591.3980.2321.2810.2241.5340.2731.5970.2802.413
 80%0.2781.3370.2321.2580.2661.5270.2231.2160.2491.6170.2612.0180.2662.731

II:
 20%0.2291.2550.2231.2480.2351.4520.2341.4020.3232.0050.2641.9870.2692.315
 30%0.2541.4310.2821.4280.2351.6650.2431.7230.2591.8350.2632.6500.2762.123
 40%0.2311.2330.2181.2190.2211.3320.2201.3810.2491.5310.2571.5830.2912.411
 50%0.2371.3420.2221.3170.2411.5390.2131.3180.2511.6890.2661.5910.2802.561
 60%0.2561.3810.2451.3590.2481.4710.2321.4250.2551.5330.2821.6350.2792.471
 70%0.2811.2590.2361.2630.2631.4110.2231.2790.2631.5760.2911.6080.2912.409
 80%0.2781.3370.2551.3580.2871.5970.2691.2210.2471.5230.2872.1070.2732.729

III:
 20%0.2831.2610.2351.2740.2501.4080.2411.2990.2401.5390.2771.6070.2912.433
 30%0.2691.3440.2411.2620.2601.5320.2491.2840.2521.6230.2582.2080.2692.751
 40%0.3671.2040.2591.8880. 2021.8830.2022.3290.2472.4280.2222.2220.2641.895
 50%0.2411.3580.2321.3210.2521.5410.2201.3270.2631.6990.2771.6030.2882.593
 60%0.2611.4210.2551.3620.2591.4850.2441.4320.2741.5430.2951.6880.2802.528
 70%0.2891.3710.2671.2740.2711.4220.2531.2690.2921.5520.2861.6620.3032.687
 80%0.2861.3450.2731.3660.2811.6220.2651.4820.2951.5380.3022.1340.3332.869

IV:
 20%0.2431.3880.2691.4220.2391.3650.2411.3500.2701.7080.2881.6940.2932.585
 30%0.2671.4350.2591.4710.2301.4880.2371.4990.2801.6380.2851.6790.3112.569
 40%0.2901.3870.2731.3650.2821.4330.2681.3280.2881.5950.2961.6750.2982.701
 50%0.2921.6670.2811.6210.2831.5600.2711.6340.2791.8070.2881.6320.3022.325
 60%0.2981.8320.2041.8340.1992.3860.1612.9120.1582.1260.1592.3250.1732.667
 70%0.2382.1810.2392.1740.2472.3920.2372.4030. 2532.3590.2332.2490.2562.411
 80%0.3002.0870.3011.9020.3212.0990.2922.0770.2952.3640.2892.6300.3222.716

*Four models with different rates of censoring.
**Average of BIC for learning set (700 cases with 100 replications).
***Average of MSE for testing set (300 cases with 100 replications).