Connections between Various Disorders: Combination Pattern Mining Using Apriori Algorithm Based on Diagnosis Information from Electronic Medical Records

Table 2

Association rules between different ICD-10 “chapters”.

No.	Association rules (ICD-10 codes)	Antecedent	Consequent	Support	Confidence	Lift
1	N18, E11 - > I10	Chronic kidney disease type 2 diabetes mellitus	Essential (primary) hypertension	1.08%	83.61%	1.98
2	G20 - > I63	Parkinson’s disease	Cerebral infarction	1.01%	83.55%	2.16
3	G45, E11 - > I63	Transient cerebral ischaemic attacks and related syndromes type 2 diabetes mellitus	Cerebral infarction	1.05%	83.18%	2.15
4	G45 - > I63	Transient cerebral ischaemic attacks and related syndromes	Cerebral infarction	3.80%	78.97%	2.17
5	G81 - > I10	Hemiplegia	Essential (primary) hypertension	1.08%	73.21%	1.77
6	N18 - > I10	Chronic kidney disease	Essential (primary) hypertension	2.90%	70.28%	1.81
7	G45, E11 - > I10	Transient cerebral ischaemic attacks and related syndromes type 2 diabetes mellitus	Essential (primary) hypertension	1.05%	70.22%	1.35
8	M50 - > I63	Cervical disc disorders	Cerebral infarction	1.74%	68.27%	1.91
9	M47 - > I63	Spondylosis	Cerebral infarction	2.15%	66.25%	1.85
10	E14 - > I10	Unspecified diabetes mellitus	Essential (primary) hypertension	2.04%	62.74%	1.61
11	J18, E11 - > I63	Pneumonia, organism unspecified type 2 diabetes mellitus	Cerebral infarction	1.01%	62.13%	1.57
12	E11 - > I10	Type 2 diabetes mellitus	Essential (primary) hypertension	11.73%	61.49%	1.58
13	E02 - > I63	Subclinical iodine-deficiency hypothyroidism	Cerebral infarction	1.02%	60.79%	1.49