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Table 19 MAE values of regression models fitted on data generated with ZINB regression model, n = 50

From: A comparison of statistical methods for modeling count data with an application to hospital length of stay

Dispersion

Proportion of Zeros

Poisson

NB

ZIP

ZINB

0.01

0.1

1.2283

1.2316

1.2274

1.2307

0.3

3.1310

3.1385

3.1209

3.1402

0.5

5.2114

5.2070

5.2052

5.2102

0.7

7.2429

7.2286

7.2366

7.2279

1

0.1

2.2478

2.2833

2.2567

2.2882

0.3

3.4686

3.5042

3.4598

3.5167

0.5

5.2457

5.2841

5.2352

5.3016

0.7

7.2643

7.3470

7.2495

7.3034

5

0.1

4.4559

4.8665

4.5330

4.9490

0.3

5.0453

5.8211

5.1587

5.9835

0.5

6.2162

7.2657

6.3823

7.1108

0.7

7.6836

19.0239

20.2636

22.7636

10

0.1

6.0659

8.2687

6.6112

9.1112

0.3

6.4278

11.9930

7.0274

9.5274

0.5

7.2752

14.5155

7.0274

9.5274

0.7

8.3214

15.8751

14.0274

16.5274