Table 1 Demographic and clinical characteristics of 81 HTLV-1-infected patients and 30 controls with osteoarthritis

Age (years)

60 (± 9) ^a

59 (± 9) ^a

0.78^b

Gender

 Female

59 (73%)

25 (83%)

0.32^c

 Male

22 (27%)

5 (17%)

Clinical/neurological status

 Carrier

48 (59%)

–

 Probable HAM/TSP

22 (27.1%)

–

 Definite HAM/TSP

11 (13.5%)

–

Pattern of joint pain

0.0001^d

 Polyarticular and symmetric

44 (54%)

3 (10%)

 Polyarticular and asymmetric

4 (5%)

4 (13%)

 Oligoarticular and symmetric

16 (20%)

4 (13%)

 Oligoarticular and asymmetric

13 (16%)

13 (44%)

 Monoarticular

4 (5%)

6 (20%)

Main joints with pain complaint

 Knees

72 (89%)

27 (90%)

1.00 ^d

 Hips

31 (38%)

3 (10%)

0.005 ^d

 Ankles

54 (67%)

12 (40%)

0.004 ^d