Table 1.
Distribution of primary disabling conditions
| Condition | Frequency | % |
| Heart diseases, including rheumatic fever, acute myocardial infarction, subacute and chronic ischemic heart disease, pulmonary heart disease, others | 89 | 15.9 |
| Arthritis (nonrheumatoid) | 75 | 13.4 |
| Diabetes mellitus | 66 | 11.8 |
| Back pain, including back problems and whiplash | 46 | 8.2 |
| Spinal cord conditions, multiple sclerosis, peripheral nerve disorders, polio, primary muscle disease | 39 | 7.0 |
| Amputation, other musculoskeletal injury | 30 | 5.4 |
| Osteoarthritis of spine, degenerative disk disease | 27 | 4.8 |
| Osteoarthritis (other than spine) | 25 | 4.5 |
| Brain substance injury including Parkinsonism, cerebral palsy, post–head injury | 23 | 4.1 |
| Cerebrovascular diseases including stroke, brain aneurysm, brain hemorrhage | 20 | 3.6 |
| Metabolic disease, organ disease (other than heart) | 20 | 3.6 |
| Rheumatoid arthritis | 19 | 3.4 |
| Emphysema, chronic obstructive pulmonary disease | 16 | 2.9 |
| Cancer | 16 | 2.9 |
| HIV, hepatitis, other infectious disease | 12 | 2.1 |
| Asthma | 11 | 2.0 |
| Blindness—complete and partial | 11 | 2.0 |
| Acquired deformities of the spine—scoliosis, fusion of the spine | 5 | 0.9 |
| Congenital deformity (not otherwise classified) | 3 | 0.5 |
| Other | 6 | 1.1 |
| Total | 559 | 100 |