Table 3.

Examples of graph search tasks and queries using Cypher language.

Number	Graph search task	Cypher querya,b
1	Search for patients with LC with 1-6 co-occurring diseases and present the topology. C-389764: Hypocalcemia C-172569: Bacterial Infection C-765209: Obstructive pneumonia C-305976: Pneumothorax C-352894: Leukopenia C-654730: Pneumonia	match (p:Patient {label:'1'})-->(f {cat: 'dac'}) where f.code = 'C-389764' or f.code = 'C-172569' or f.code = 'C-765209' or f.code = 'C-305976' or f.code = 'C-352894' or f.code = 'C-654730' return p, f;
2	Search for patients with LC with 1-5 nonlaboratory factors and present the topology C-549780: Pain C-289547: Bloodstained sputum C-127089: Hoarseness C-029761: Productive Cough C-294680: Swollen Lymph Node in head and neck	match (p:Patient {label:'1'})-->(f) where (f.code = 'C-549780' and f.valcvt = 'true') or (f.code = 'C-289547' and f.valcvt='true') or (f.code = 'C-127089' and f.valcvt='true') or (f.code = 'C-029761' and f.valcvt='true') or (f.code = 'C-294680' and f.valcvt='true') return p, f;
3	Search for patients with LC with 1-5 laboratory test values and present the topology. C-659218: Hepatitis B virus C-493765: Squamous cell carcinoma antigen C-573086: Neuron-specific enolase measurement C-120948: Gastrin-releasing peptide precursor increased C-814793: Mycoplasma pneumoniae antibody	match (p:Patient {label:'1'})-->(f {cat: 'lab'}) where (f.code = 'C-659218' and f.valcvt = 'true') or (f.code = 'C-493765' and f.valcvt = 'up') or (f.code = 'C-573086' and f.valcvt = 'up') or (f.code = 'C-120948' and f.valcvt = 'abnormal') or (f.code = 'C-814793' and f.valcvt = 'abnormal') return p, f;
4	Search for 1 patient, show the electronic medical record health factor graph and the Unified Medical Language System knowledge graph together	match (p:Patient {label:'1', vpid:'_8908085766'})-->(f) match (p)-->(ap:AbstractPatient)-->(tc:TargetConcept)-->(cr:RelCat)-->(c:Concept) return p, f, ap, tc, cr, c;

^aUsing Neo4j Cypher query language.

^bPatient with LC: label=1; background patient: label=0. Factor property f.code: unique local code. Factor property f.valcvt: converted value.