Table 3.

The top 50 ICPC-2 titles for diagnoses in the General Internal Medicine Department of Chikusei City Hospital, Chikusei City, Japan

Order	ICPC-2 code7	ICPC-2 title	n	%	Cumulative %
1	R74	Upper respiratory infection acute	288	16.7	16.7
2	D73	Gastroenteritis presumed infection	101	5.8	22.5
3	D87	Stomach function disorder	78	4.5	27.0
4	R78	Acute bronchitis/bronchiolitis	70	4.1	31.1
5	A97	No disease	69	4.0	35.1
6	K86	Hypertension uncomplicated	66	3.8	38.9
7	T93	Lipid disorder	49	2.8	41.7
8	T90	Diabetes non-insulin dependent	42	2.4	44.2
9	R80	Influenza	39	2.3	46.4
10	R81	Pneumonia	32	1.9	48.3
11	D84	Esophagus disease	31	1.8	50.1
12	D97	Liver disease NOS	28	1.6	51.7
12	R96	Asthma	28	1.6	53.3
14	H82	Vertiginous syndrome	23	1.3	54.7
14	R99	Respiratory disease other	23	1.3	56.0
16	N17	Vertigo/dizziness	22	1.3	57.3
17	D12	Constipation	20	1.2	58.4
18	A88	Adverse effect physical factor	19	1.1	59.5
18	P74	Anxiety disorder/anxiety state	19	1.1	60.6
20	D78	Neoplasm digestive system benign/unspecified	18	1.0	61.7
20	N01	Headache	18	1.0	62.7
22	D86	Peptic ulcer other	17	1.0	63.7
23	K77	Heart failure	16	0.9	64.6
24	L99	Musculoskeletal disease other	15	0.9	65.5
24	R75	Sinusitis acute/chronic	15	0.9	66.4
24	U71	Cystitis/urinary infection other	15	0.9	67.2
27	N95	Tension headache	14	0.8	68.0
28	D93	Irritable bowel syndrome	13	0.8	68.8
28	K78	Atrial fibrillation/flutter	13	0.8	69.5
30	A11	Chest pain NOS	12	0.7	70.2
30	L18	Muscle pain	12	0.7	70.9
30	P06	Sleep disturbance	12	0.7	71.6
30	U95	Urinary calculus	12	0.7	72.3
34	P76	Depressive disorder	10	0.6	72.9
34	R79	Chronic bronchitis	10	0.6	73.5
36	D83	Mouth/tongue/lip disease	9	0.5	74.0
36	D99	Disease digestive system other	9	0.5	74.5
36	N99	Neurological disease other	9	0.5	75.0
36	U06	Hematuria	9	0.5	75.6
36	U99	Urinary disease other	9	0.5	76.1
41	A04	Weakness/tiredness general	8	0.5	76.5
41	L83	Neck syndrome	8	0.5	77.0
41	R76	Tonsillitis acute	8	0.5	77.5
41	T99	Endocrine/metabolic/nutritional disease other	8	0.5	77.9
45	B70	Lymphadenitis acute	7	0.4	78.3
45	B80	Iron deficiency anemia	7	0.4	78.7
45	P75	Somatization disorder	7	0.4	79.2
45	T11	Dehydration	7	0.4	79.6
45	T82	Obesity	7	0.4	80.0
50	D74	Malignant neoplasm stomach	6	0.3	80.3
		Others	340	19.7	100.0
Total			1,727	100.0

Abbreviations: ICPC-2, International Classification of Primary Care, 2nd edition; NOS, not otherwise specified.