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Table 11 Four-year changes in Osame motor disability score (OMDS) in the three subgroups classified by interferon-α treatment conditions (n = 148)

From: Real-world clinical course of HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) in Japan

  OMDS change  
Improved No change Worsened Total
Patients with HAM/TSP without interferon-α treatment during the observation period 2 (1.5%) 86 (65.6%) 43 (32.8%) 131 (100.0%)
Patients with HAM/TSP with at least once interferon-α treatment during the observation period 0 (0.0%) 3 (30.0%) 7 (70.0%) 10 (100.0%)
Patients with HAM/TSP with at least once unknown treatment condition during the observation period 0 (0.0%) 5 (71.4%) 2 (28.6%) 7 (100.0%)
Total 2 (1.4%) 94 (63.5%) 52 (35.1%) 148 (100.0%)