Comorbidity study of borderline personality disorder: applying association rule mining to the Taiwan national health insurance research database

Table 2 Physical comorbidity rates of borderline personality disorder (BPD) cases and non-BPD controls with diseases categorized in ICD-9-CM coding system

		BPD				BPD (total)^c (%)	Non-BPD (total)^d (%)	OR	95% CI
Category of comorbid disease	ICD 9 CM codes	Female (%)	Male (%)	OR^a	95% CI^b	BPD (total)^c (%)	Non-BPD (total)^d (%)	OR	95% CI
Respiratory system	460–519	96.8	88.2	4.09	1.49–11.2^e	93.8	88.2	2.04	1.23–3.39^e
Nervous system and sense organs	320–389	72.6	64.7	1.45	0.86–2.43	69.9	52.9	2.15	1.63–2.83^e
Digestive system	520–579	95.8	87.3	3.32	1.33–8.31^e	92.8	81.9	2.85	1.78–4.55^e
Skin and subcutaneous tissue	680–709	72.6	65.7	1.39	0.83–2.33	70.2	56.0	1.85	1.41–2.44^e
Injury and poisoning	800–999	84.7	84.3	1.03	0.53–2.01	84.6	53.2	4.84	3.45–6.78^e
Infectious and parasitic	001–139	52.1	42.2	1.49	0.92–2.43	48.6	35.6	1.71	1.32–2.22^e
Genitourinary system	580–629	81.1	22.5	14.7	8.15–26.5^e	60.6	46.3	1.78	1.37–2.31^e
Musculoskeletal system	710–739	65.3	61.8	1.16	0.71–1.92	64.0	42.1	2.45	1.88–3.19^e
Congenital anomalies	740–759	3.68	2.94	1.26	0.32–4.99	3.42	1.63	2.14	0.99–4.66
Endocrine, metabolic and immunity	240–279	31.6	14.7	2.68	1.43–5.01^e	25.7	14.3	2.07	1.52–2.82^e
Neoplasm	140–239	27.4	12.7	2.58	1.33–5.01^e	22.3	11.5	2.21	1.59–3.07^e
Circulatory system	390–459	29.5	23.5	1.36	0.78–2.36	27.4	11.1	3.01	2.20–4.13^e
Blood and blood-forming organs	280–289	17.4	4.90	4.08	1.54–10.8^e	13.0	4.79	2.97	1.93–4.59^e

^a OR odds ratio, ^b CI confidence interval, ^c Total BPD cases, ^d Total non-BPD controls, ^e Statistical significance

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