Table 1.

Demographics and clinical features of the distal symmetric polyneuropathy (DSP) population

Variable	N (%) Unless otherwise specified
Age, mean (SD)	65.8 (12.9)
Female	258 (56.3%)
Insurance status
HMO, PPO, Private	244 (53.3%)
HMO, PPO, Private and Medicare	117 (25.5%)
Medicare, Medicaid, or both	82 (17.9%)
VA/Tricare/Champus	11 (2.4%)
Not insured	2 (0.4%)
Nueces County Indigent Health Care Program	2 (0.4%)
Toronto criteria
Neuropathic symptoms	327 (71.4%)
Abnormal sensory examination	445 (97.2%)
Decreased reflexes	378 (82.5%)
2/3 criteria	224 (48.9%)
3/3 criteria	234 (51.1%)
Time since onset of neuropathy in months, mean (SD)	39.2 (49.6)
Family history of neuropathy	8 (1.7%)
Neuropathic pain	218 (47.6%)
Weakness or atrophy on examination	77 (16.8%)
Warning signs of an atypical neuropathy
Acute/subacute/relapsing presentation	40 (8.7%)
Motor predominant	1 (0.2%)
Asymmetric	35 (7.6%)
Non-length dependent	6 (1.3%)
Prominent autonomic involvement	5 (1.1%)
Number of neurology visits, mean (SD)	2.4 (1.6)
Length of follow up (days), mean (SD)	435.3 (44.1)

HMO= health maintenance organization, PPO= preferred provider organization