Year (No. cases) | ||||||||
---|---|---|---|---|---|---|---|---|
1995 (45) | 1996 (48) | 1997 (66) | 1998 (67) | 1999 (67) | 2000 (78) | 2001 (79) | 1995-2001 (440) | |
64 | 73 | 63 | 67 | 66 | 62 | 71 | 66 | |
Age, years, mean | 60 | 59 | 62 | 63 | 61 | 62 | 60 | 61 |
Swelling ≥3 joint areas* | 93 | 92 | 79 | 91 | 86 | 94 | 87 | 89 |
Symmetrical swelling* | 89 | 94 | 83 | 91 | 91 | 96 | 94 | 91 |
Rheumatoid factor positive§ | 68 | 85 | 86 | 81 | 78 | 68 | 67 | 76 |
Rheumatic nodules* | 5 | 4 | 11 | 9 | 5 | 6 | 4 | 7 |
Radiographic changes* | 24 | 22 | 33 | 21 | 19 | 18 | 25 | 23 |