Table 1.
Characteristics of the study subjects.
| DM (n=91) |
PM (n=7) |
|
|---|---|---|
| Age at biopsy (years; median [Q1–Q3]) | 48 (37–60) | 39 (35–53) |
| Age at onset (years; median [Q1–Q3]) | 45 (34–58) | 38 (33–52) |
| Time from onset to biopsy (months; median [Q1–Q3]) | 10 (4–21) | 11 (1–15) |
| Sex (female % [n]) | 64% (58) | 86% (6) |
| Race (W/B/O* % [n]) | W: 68% (62) B: 15% (14) O: 16% (15) |
W: 71% (5) B: 14% (1) O: 14% (1) |
| Place of biopsy (Q/D/B/O** % [n]) | Q: 68% (42) D: 15% (37) B: 16% (8) U: 16% (4) |
Q: 57% (4) D: 29% (2) U: 14% (1) |
*
W/B/O: White/Black/Other
**
Q/D/B/U: Quadriceps/Deltoid/Biceps/Unknown