Table 2.
Demographics and characteristics of the patient records that were, and were not, deemed to have possible or definite idiopathic Parkinson's disease
| Deemed to have IPD N = 150 | Deemed not to have IPD N = 167 | p-value | |
| Date of birth, mean | 1929 | 1935 | <0.0001 |
| Age at death, mean, n | 75.8, n = 10 | 79.6, n = 16 | 0.30 |
| Period of Service, no. (%) | 0.01 | ||
| WWII | (50.3) | (30.4) | |
| Vietnam | (22.6) | (35.6) | |
| Other | (27.0) | (34.0) | |
| Percent service connected, mean | 57.3 | 62.7 | <0.0001 |
| Gender, no. (%) | 0.09 | ||
| Male | (96.9) | (92.7) | |
| ICD-9 CM codes, no. (%) | |||
| 332.0 | (76.1) | (30.4) | <.0001 |
| 332.1 | (14.4) | (0.6) | 0.006 |
| 333.0 | (8.8) | (4.7) | 0.12 |
| 333.90 | (5.0) | (10.5) | 0.06 |
| 311 (depression) | (35.2) | (37.1) | 0.71 |
| Diagnoses | |||
| IPD | 113 | - | |
| Possible IPD | 37 | - | |
| Medication-induced parkinsonism | 17 | - | |
| Parkinsonism | 10 | - | |
| Non-parkinsonism movement disorder | 93 | - | |
| Other neurological disorder | 47 | - | |
| Clinical characteristics | |||
| Postural instability | 26 (17.3) | 4 (2.4) | <0.0001 |
| Bradykinesia | 51 (34.0) | 5 (3.0) | <0.0001 |
| Rigidity | 46 (30.7) | 8 (4.8) | <0.0001 |
| Resting tremor | 61 (40.7) | 11 (6.6) | <0.0001 |
| Gait difficulty | 47 (31.3) | 6 (3.6) | <0.0001 |