Table 3. Frequency Distribution and Result of the ZIGP Model .

Parameter (category)	Number	%	Estimation	SE	p
Fixed value	334	-	0.15	1.139	0.89
Appendicitis (No*/Yes)	30	9	-3.70	1.411	0.008
Digestive disease (No*/Yes)	123	36.8	0.06	0.360	0.871
Abdomen and its contents (No*/Yes)	53	15.9	-0.74	0.353	0.036
Skeletal and muscle system (No*/Yes)	19	5.7	0.14	0.468	0.769
Blood and lymphatic system (No*/Yes)	13	3.9	-0.12	0.532	0.827
Glands (No*/Yes)	40	12	0.35	0.382	0.365
Urinary system (No*/Yes)	7	2.1	0.05	0.457	0.908
Hemorrhoids (No*/Yes)	21	6.3	-2.14	0.847	0.011
Cardiovascular system (No*/Yes)	25	7.5	-0.042	0.453	0.926
Female reproductive system (No*/Yes)	3	0.9	0.59	0.750	0.435
Breast (No*/Yes)	8	2.4	-0.61	0.826	0.458
Lung (No*/Yes)	5	1.5	-1.56	0.814	0.049
Skin (No*/Yes)	13	3.9	-2.23	1.088	0.040
Type of insurance (No*/Yes)	278	83.2	0.53	0.266	0.046
History of smoking (Non-smoker*/Smoker)	50	15	0.19	0.226	0.407
Hypertension (No*/Yes)	47	14.1	0.49	0.215	0.023
Diabetes (No*/Yes)	39	11.7	-0.004	0.239	0.987
Heart disease (No*/Yes)	38	11.4	0.44	0.260	0.047
Hyperlipidemia (No*/Yes)	16	4.8	0.58	0.305	0.047
Kidney disease (No*/Yes)	25	7.5	-0.03	0.309	0.916
Comorbid disease (No*/Yes)	41	12.3	-0.002	0.234	0.993
Hemoglobin (Not natural*/Natural)	243	72.8	-0.07	0.178	0.697
Gender (Female*/male)	220	65.9	0.055	0.192	0.774
Marital status (Single*/Married)	252	75.4	0.12	0.225	0.606
Place of residence (Non-local*/Local)	71	21.3	-0.43	0.183	0.019
Type of admission (Low risk*/Medium Risk)	56	16.8	0.001	0.275	0.997
Type of admission (Low risk*/High Risk)	13	3.9	-0.57	0.430	0.181
Type of admission (Emergency/ hospitalization)	219	65.6	-0.20	0.204	0.323
Number of tests	4.82	3.13	0.17	0.023	<0.001
Age	45.174	16.47	0.25	0.006	0.046
Number of surgery	1.59	1.02	0.06	0.090	0.496
Pulse	81.03	7.42	-0.005	0.012	0.701

*Reference group