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Table 2 Descriptive statistics and Mann–Whitney test results

From: Association between microscopic brain damage as indicated by magnetization transfer imaging and anticardiolipin antibodies in neuropsychiatric lupus

Parameter IgM aCL+ IgM aCL- P IgG aCL+ IgG aCL- P Lac+ Lac- P
Number of patients 9 9 - 9 9 - 13 5 -
Age (years) 36.4 ± 13.4 31.6 ± 6.4 0.67 31.3 ± 6.5 36.7 ± 13.2 0.49 34.9 ± 10.9 31.6 ± 10.2 0.50
Duration of SLE (years) 7.4 ± 5.0 10.6 ± 8.8 0.55 8.4 ± 3.6 9.6 ± 9.8 0.67 8.8 ± 7.1 9.6 ± 8.0 0.85
Duration of NPSLE (years) 4.4 ± 4.0 6.2 ± 5.5 0.49 4.9 ± 3.2 5.7 ± 6.1 0.73 5.7 ± 5.2 4.3 ± 3.7 0.57
Grey matter peak location 33.8 ± 0.7 34.7 ± 1.0 0.077 34.1 ± 0.3 34.3 ± 1.3 0.67 34.0 ± 0.1 34.8 ± 1.3 0.34
Grey matter peak height 131 ± 24 138 ± 19 0.67 135 ± 28 133 ± 14 0.93 133 ± 22 138 ± 23 0.63
Grey matter mean MTR 32.6 ± 0.9 33.8 ± 1.0 0.011 33.0 ± 0.8 33.3 ± 1.4 0.49 32.9 ± 1.1 33.8 ± 1.1 0.12
White matter peak location 37.2 ± 1.0 38.4 ± 1.0 0.019 37.8 ± 0.4 37.9 ± 1.6 0.93 37.6 ± 1.0 38.4 ± 1.6 0.50
White matter peak height 184 ± 31 178 ± 20 0.26 185 ± 32 177 ± 18 0.16 180 ± 27 183 ± 24 0.99
White matter mean MTR 37.2 ± 0.9 38.2 ± 1.0 0.014 37.6 ± 0.3 37.8 ± 1.5 0.44 37.4 ± 0.9 38.4 ± 1.3 0.14
  1. Listed are the mean values ± standard deviation for IgM-positive/IgM-negative and IgG-positive/IgG-negative aCLs as well as Lac, and P values of Mann–Whitney tests between the groups. aCL, anticardiolipin antibody; Lac, lupus anticoagulant; MTR, magnetization transfer ratio; NPSLE, neuropsychiatric systemic lupus erythematosus; SLE, systemic lupus erythematosus.