Table 2.

The results of stepwise regression.

Backward Elimination
Disease	p-Value	Disease	p-Value
Abdominal pain	1.16 × 10−7 ***	Gout	0.038517 *
Peptic ulcer, site unspecified	2.06 × 10−14 ***	Functional digestive disorders, not elsewhere classified	0.019337 *
Symptoms involving digestive system	3.35 × 10−5 ***	Neurotic disorders	0.069057
Gastritis and duodenitis	0.000162 ***	Disorders of conjunctiva	0.090836
Disorders of function of stomach	3.88 × 10−5 ***	Heart failure	0.090678
Chronic liver disease and cirrhosis	2.51 × 10−12 ***	Essential hypertension	0. 054,498
General symptoms	0.000860 ***	Other forms of chronic ischemic heart disease	0.068356
Cholangitis	1.03 × 10−14 ***	Other and unspecified disorders of the back	0.082334
Pancreatitis	4.14 × 10−9 ***	Duodenal ulcer	0.059147
Symptoms involving head and neck	0.005121 **	Calculus of kidney and ureter	0.067626
Symptoms involving respiratory system and other chest symptoms	0.007710 **	Acute nasopharyngitis	0.136144
Urticaria	0.002506 **	Acute laryngitis and tracheitis	0.123336
Other cellulitis and abscess	0.003819 **	Gastric ulcer	0.141536
Acute bronchitis and bronchiolitis	0.021931 *	* Hypertensive heart disease	0.153331
Cardiac dysrhythmias	0.032659 *	Osteoarthrosis and allied disorders	0.13224
Acute and subacute necrosis of liver	0.010382 *	Other disorders of pancreatic internal secretion	0.132718
Diabetes mellitus	0.017619 *	Significant codes: <0.001 ‘***’ 0.001 ‘**’ 0.01 ‘*’