Table 1 Patient characteristics based on the presence of CADM or anti-MDA-5 antibodies
|  |  |  | CADM | α-MDA-5-positive | ||||
|---|---|---|---|---|---|---|---|---|
Years of sera collection | Total number of DM patients (M:F) | Mean age at onset (range) | Number (%) of patients (M:F) | Pvalue* | Mean age at onset (range) | Number (%) of patients (M:F) | Pvalue** | Mean age at onset (range) |
T1 (1994 to 1995) | 32 (12:20) | 47.5 (4 to 80) | 6 (18.8%) (2:4) | P for difference = 0.012 | 45.5 (4 to 73) | 2 (6.3%) (1:1%) | P for difference = 0.003 | 53 (43 to 63) |
T2 (1996 to 2003) | 30 (6:24) | 50.1 (15 to 79) | 12 (40.0%) (1:11) | P for trend = 0.003 | 50.7 (20 to 73) | 10 (33.3%) (0:10) | P for trend = 0.001 | 48.9 (20 to 66) |
T3 (2004 to 2011) | 33 (10:23) | 43.6 (1 to 73) | 18 (54.5%) (5:13) | Â | 40.8 (1 to 69) | 14 (42.4%) (4:10) | Â | 44.4 (11 to 58) |