|  | AMCV IgA-positive patients | AMCV IgA-negative patients | Mann–Whitney U P value |
---|---|---|---|---|
(n = 21) | (n = 29) | |||
AMCV IgG | positive (%, n) | 100 % (21/21) | 100 % (29/29) | Â |
 | negative (%, n) | 0 | 0 |  |
 | mean titer (U/ml) | 1128.58 | 548.13 | 0.012 |
 | SD (U/ml) | 1160.25 | 573.98 |  |
AMCV IgM | positive (%, n) | 71 % (15/21) | 34 % (10/29) | Â |
 | negative (%, n) | 29 % (6/21) | 66 % (19/29) |  |
 | mean titer (U/ml) | 98.65 | 27.1 | 0.005 |
 | SD (U/ml) | 157.69 | 47.63 |  |
RF IgG | positive (%, n) | 10 % (2/21) | 3 % (1/29) | Â |
 | negative (%, n) | 90 % (19/21) | 97 % (28/29) |  |
 | mean titer (IU/ml) | 16.42 | 9.54 | 0.013 |
 | SD (IU/ml) | 15.62 | 14.13 |  |
RF IgM | positive (%, n) | 71 % (15/21) | 48 % (14/29) | Â |
 | negative (%, n) | 29 % (6/21) | 52 % (15/29) |  |
 | mean titer (IU/ml) | 83.47 | 34.96 | 0.071 |
 | SD (IU/ml) | 103.29 | 51.77 |  |
RF IgA | positive (%, n) | 81 % (17/21) | 41 % (12/29) | Â |
 | negative (%, n) | 19 % (4/21) | 59 % (17/29) |  |
 | mean titer (IU/ml) | 161.68 | 88.66 | 0.003 |
 | SD (IU/ml) | 137.91 | 120.54 |  |
ACCP IgG | positive (%, n) | 100 % (21/21) | 86 % (25/29) | Â |
 | negative (%, n) | 0 % (0/21) | 14 % (4/29) |  |
 | mean titer (U/ml) | 1262.77 | 989.99 | 0.253 |
 | SD (U/ml) | 597.03 | 776.62 |  |