Table 2.

Descriptions of the symbols in Figs. 15 and 16

Symbol	Variable	n	Description
and	Bn and BXn	3	Lyme disease
		11	Polymyositis
	Xn	7	Erythema migrans
		12	ECG shows cardiac block
		16	Radiculopathy
		17	Experience of field travelling
		36	ESR
		37	CRP
		38	Sex
		40	Conjunctivitis ANA
		58
		60	RF
		62	WBC
		70	HGB
		85	Skin rash
		89	Splenomegaly
		91	Arthralgia (acute or chronic)
		92	Arthralgia (large or small joint)
		93	Arthralgia (axis or peripheral)
		94	Arthralgia (self-limited or aggravating)
		95	CSF-WBC
		96	CSF-P
		99	CSF-PRO
		100	Abnormal ultrasonocardiography
		101	Headache
		102	Nausea
		103	Vomit
		104	Mental disorders
		105	Facial palsy
		106	Meningeal irritation sign
		110	Lymphadenectasis
		111	Hepatomegaly
		140	Chest CT shows interstitial pneumonia
		144	Testis swelling
		145	Borrelia burgdorferi-IgG
		146	Fever
		147	Cerebellar ataxia
		149	AST or ALT
		150	TBIL
		151	DBIL
		158	Myalgia
		161	Dysphagia
		162	Myasthenia
		165	Facet joint of hand pathological change
		172	Arthralgia (quantity)
		175	Limbs proximal myasthenia
		176	Weight loss
		178	Electromyogram shows myogenic muscular atrophy
		179	CK
		180	Dyspnea
		209	Anorexia
	Cn	29	Symptom
		30	Sign
		31	Brucella culture
		32	Other imaging tests
		33	CT
		34	Blood biochemical test
		35	Anti-MCV antibody
		71	PLT
		72	CT shows sacroiliac joint injury
		73	ECG
		74	Ultrasonocardiography
		75	Rheumatic test
		76	Blood RT
		77	CSF RT
		78	CSF biochemical test
		79	Virus and infection related test
		80	Autoimmune antibody test
	SXn	13	Muscle biopsy shows myositis