Table 1: Definition of Key Variables and their Corresponding ICD-9 Codes

Condition ICD-9 Code Definition
Stroke [13] 342
430
431
432
433
434
435
436
437
438
V57
Hemiplegia and hemiparesis
Subarachnoid hemorrhage
Intracerebral hemorrhage
Other and unspecific intracranial hemorrhage
Occlusion and stenosis of precerebral arteries
Occlusion of cerebral arteries
Transient cerebral ischemia
Acute, but ill-defined cerebovascular disease
Other ill-defined cerebrovascular disease
Late effects of cerebrovascular disease
Care involving use of rehabilitation procedures
Neovascular AMD [16,35] 362.42-362.43
362.52
362.53
Serous or hemorrhagic detachment of retinal pigment epithelium
Exudative senile macular degeneration of retina
Cystoid macular degeneration of retina
Non-neovascular [16, 35] 362.5
362.50
362.51
362.57
Degeneration of macula and posterior pole
Unspecified macular degeneration (senile) of retina
Nonexudative senile macular degeneration of retina
Drusen (degenerative) of retina
Hypertension 401.0 - 401.9
402.00 - 402.91
403.00 - 403.91
404.00-404.93
Essential hypertension
Hypertensive heart disease
Hypertensive renal disease
Hypertensive heart and renal disease
Diabetes 250.00-250.93
357.2
362.01
362.02
366.41
Diabetes
Polyneuropathy in diabetes
Background diabetic retinopathy
Proliferative diabetic retinopathy
Diabetic cataract
MI 410.00 - 410.92 Acute myocardial infarction

AMD: Age-related Macular Degeneration; MI: Myocardial Infarction.