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Table 1 Diagnostic codes for dementia and included covariates from the International Classification of Diseases

From: Mid- to late-life migraine diagnoses and risk of dementia: a national register-based follow-up study

Type of diagnoses ICD-8 codes ICD-10 codes
Dementia
 Alzheimer’s disease 290.10 F00.0–00.9, G30.0–30.9
 Vascular dementia 293.09–19 F01.0–01.9
 Frontotemporal dementia 290.11 F02.0
 Lewy body dementia   G31.8
 Unspecified and other dementia 290.09, 290.18–19 F03.9, G31.9
Headache
 Cephalalgia 791.99 DR51, DR519
 Other headache syndromes   G44
 Cluster headache syndrome   G44.0
 Vascular headache   G44.1
 Tension-type headache   G44.2
 Chronic post-traumatic headache   G44.3
 Drug-induced headache   G44.4
 Other specified headache syndromes   G44.8
Psychiatric
 Schizophrenia, schizotypal and delusional disorders 295.09–99, 297.09–99 F20-F29
 Mood affective disorders 296.09–99, 790.29 F30-F39
 Other or unspecified psychoses 298.09–99, 299.00–09  
 Neuroses 300.49–99  
 Transient situational disturbances 307.99  
 Acute stress reactions   F43.0
 Post-traumatic stress disorders   F43.1
 Adjustment disorders   F43.2
 Other stress reactions   F43.8
 Unspecified stress reactions   F43.9
Charlson Comorbidity Index
 Myocardial infarction 410 I21, I22, I23
 Heart failure 427.09, 427.10, 427.11, 427.19, 428.99, 782.49 I50, I110, I130, I132
 Peripheral vascular disease 440, 441, 442, 442, 444, 445 I70, I71, I72, I74, I77
 Cerebral vascular accident 430–438 I60-I69, G45, G46
 Pulmonary disease 490–493, 515–518 J40-J47, J60-J67, J684, J701, J703. J841, J920, J961, J982, J983
 Connective tissue disorder 712, 716, 734, 446, 135.99 M05, M06, M08, M09, M30, M31, M32, M33, M34, M35, M36, D86
 Ulcer disease 530.91, 530.98, 531–534 K221, K25-K28
 Mild liver disease 571, 573.01, 573.04 B18, K700–703, K709, K71, K73, K74, K760
 Diabetes 249.00, 249.06, 249.07, 249.09, 250.00, 250.06, 250.07, 250.09 E100, E101, E109, E110, E111, E119
 Hemiplegia 334 G81, G82
 Renal disease 403, 404, 580–584, 590.09, 593.19, 753.10, 753.20, 792 I12, I13, N00, N06, N07, N11, N14, N17-N19, Q61
 Diabetes with complications 249.01–249.05, 249.08, 250.01–250.05, 250.08 E102-E108, E112-E118
 Cancer 140–194 C00-C75
 Leukemia 204–207 C91-C95
 Lymphoma 200–203, 275.59 C81-C85, C88, C90, C96
 Severe liver disease 070.00, 070.02, 070.04, 070.06, 070.08, 573.00, 456.00–456.10 B150, B160, B162, B190, K704, K72, K766, I85
 Metastatic cancer 195–199 C76, C81
 HIV 079.83 B21-B24
  1. ICD International Classification of Diseases of the 8th (ICD-8) and 10th version (ICD-10)