Table 2. The Fitness Of Zero-Inflated Poisson and Zero-Inflated Negative Binominals Regression Models .

Parameter (category)	ZIP		ZINB
	Estimation	p	Estimation	p
Fixed value	0.14	0.83	0.24	0.838
Appendicitis (No*/Yes)	-3.71	<0.001	-3.80	<0.001
Digestive disease (No*/Yes)	0.0992	0.65	0.02	0.95
Abdomen and its Contents (No*/Yes)	-0.79	<0.001	-0.78	0.023
Skeletal and muscle system (No*/Yes)	0.15	0.604	.004	0.99
Blood and lymphatic system (No*/Yes)	-0.11	0.74	-0.16	0.747
Glands (No*/Yes)	0.38	0.101	0.38	0.317
Urinary system (No*/Yes)	0.05	0.854	-0.12	0.802
Hemorrhoids (No*/Yes)	-2.16	0.001	-1.97	0.003
Cardiovascular system (No*/Yes)	-0.03	0.91	-0.14	0.772
Female reproductive system (No*/Yes)	0.58	0.175	0.39	0.569
Breast (No*/Yes)	-0.62	0.292	-0.77	0.275
Lung (No*/Yes)	-1.54	0.004	-1.69	0.047
Skin (No*/Yes)	-2.24	0.004	-2.08	0.041
Type of insurance (No*/Yes)	0.54	0.001	0.01	0.047
History of smoking (Non-smoker*/Smoker)	0.18	0.187	0.28	0.242
Hypertension (No*/Yes)	0.53	0.000	0.55	.019
Diabetes (No*/Yes)	0.04	0.763	-0.14	0.593
Heart disease (No*/Yes)	0.43	0.006	0.41	0.049
Hyperlipidemia (No*/Yes)	0.61	0.001	0.39	0.062
Kidney disease (No*/Yes)	-0.01	0.963	-0.042	0.905
Comorbid disease (No*/Yes)	-0.01	0.957	-0.09	0.709
Hemoglobin (Not natural*/Natural)	-0.06	0.551	-0.10	0.60
Gender (Female*/male)	0.04	0.751	0.01	0.944
Marital status (Single*/Married)	0.18	0.21	0.19	0.38
Place of residence (Non-local*/Local)	-0.51	0.000	-0.64	0.001
Type of admission (Low risk*/Medium Risk)	0.03	0.872	0.173	0.992
Type of admission (Low risk*/High Risk)	0.58	0.023	0.066	0.90
Type of admission (Emergency/ hospitalization)	-0.26	0.029	-0.29	0.162
Number of tests	0.17	0 .000	.1589	0 .000
Age	0.24	.0424	0.25	.0456
Number of surgery	0.06	0.231	0.143	0.120
Pulse	-0.01	0.415	-0.001	0.965
AIC	1184		1072

*Reference group