Table 1.
Demographic and clinical characteristics of early-onset HAM/TSP patients.
| Demographic/Clinical Characteristics (Total = 38) | n (%) 1 |
|---|---|
| Female | 25 (66) |
| HTLV-1 diagnosis made due to HAM/TSP symptoms | 32 (84) |
| Duration of breastfeeding >1 year (n = 34) | 27 (79) |
| History of blood transfusion | 6 (16) |
| Patients with family members tested for HTLV-1 | 31 (82) |
| Mothers with confirmed HTLV-1 diagnosis | 22 (71) |
| Patients with other family members with HTLV-1 infection | 17 (55) |
| A family member with walking difficulties attributable to HAM/TSP | 14 (37) |
| Mothers diagnosed with HAM/TSP | 10 (26) |
| Age of onset of HAM/TSP symptoms, years, median (IQR) | 14 (7) |
| Female patients | 14 (5) |
| Male patients | 16 (6) |
| Duration of symptoms prior to diagnosis, years, median (IQR) | 6 (7) |
| Follow-up duration, years, median (IQR) | 4.5 (13) |
1 Values are n (%) unless noted otherwise. HTLV-1: human T-cell lymphotropic virus Type 1. HAM/TSP: HTLV-1-associated myelopathy/tropical spastic paraparesis. IQR: Interquartile range.