Table II.
Classic DM | ||||
---|---|---|---|---|
Department | Dermatology | Rheumatology | Both | P value |
No. of patients | 27 | 24 | 7 | |
Sex | ||||
Female | 25 (93%) | 15 (63%) | 5 (71%) | .015* |
Male | 2 (7%) | 9 (38%) | 2 (29%) | |
Ethnicity | ||||
Caucasian | 23 (85%) | 12 (50%) | 6 (86%) | .014* |
African American | 2 (7%) | 9 (38%) | ||
Other | 2 (7%) | 3 (13%) | 1 (14%) | |
Age at DM diagnosis, y | 45.4 (19) | 45.0 (20) | 40.4 (19) | .93 |
Age at first DM symptoms, y | 43.3 (20) | 42.3 (20) | 38.9 (19) | .85 |
Symptom onset to DM diagnosis, y | 2.1 (8) | 2.7 (7) | 1.6 (2) | .78 |
Weakness | ||||
None | 1 (4%) | 2 (8%) | .18 | |
2/4 | 3 (11%) | |||
3/4 | 2 (8%) | |||
4/4 | 23 (85%) | 20 (83%) | 7 (100%) | |
Neuropathy | ||||
Present | 7 (26%) | 6 (25%) | 2 (29%) | 1.0 |
Absent | 20 (74%) | 18 (75%) | 5 (71%) | |
Dysphagia | ||||
Present | 14 (52%) | 17 (71%) | 6 (86%) | .25 |
Absent | 13 (48%) | 7 (29%) | 1 (14%) | |
Malignancy | ||||
Yes | 7 (26%) | 2 (8%) | .15 | |
No | 20 (74%) | 22 (92%) | 7 (100%) | |
ILD | ||||
Present | 6 (22%) | 13 (54%) | 4 (57%) | .023* |
Absent | 21 (78%) | 11 (46%) | 3 (43%) | |
CPK† | 1798 (4532) | 3616 (6611) | 352 (331) | .27 |
Aldolase† | 15 (23) | 27 (47) | 12 (4) | .27 |
Muscle biopsy | ||||
c/w DM | 14 (93%) | 15 (94%) | 4 (100%) | 1.0 |
Not c/w DM | 1 (7%) | 1 (6%) |
CPK, Creatine phosphokinase; c/w, consistent with; DM, dermatomyositis; ILD, interstitial lung disease.
P values reflect comparisons between dermatology and rheumatology.
Values are not normally distributed.