Table 1 Summary of clinical characteristics
MDA-5 positive | MDA-5 negative | p value | |
|---|---|---|---|
(n = 10) | (n = 6) | ||
Gender (male/female) | 6/4 | 2/4 | 0.608 |
Age | 63.0 (58.0–64.8) | 71.5 (64.8–73.8) | 0.0913 |
Smoking history | 5 (50 %) | 2 (33 %) | 0.633 |
Days from onset to first visit | 15.5 (11.0–29.8) | 51.0 (39.5–77.5) | 0.157 |
Department of the first visit | |||
Respiratory medicine | 6 (60 %) | 1 (17 %) | – |
Rheumatology | 2 (20 %) | 5 (83 %) | – |
Dermatology | 2 (20 %) | 0 | – |
Symptoms and signs at the time of diagnosis | |||
Gottron’s sign/papule | 7 (70 %) | 5 (83 %) | 1.00 |
Heliotrope eruption | 7 (70 %) | 1 (17 %) | 0.119 |
V/shawl neck sign | 5 (50 %) | 2 (33 %) | 0.633 |
Mechanic’s hands | 2 (20 %) | 2 (33 %) | 0.604 |
Palmar erythema | 2 (20 %) | 1 (17 %) | 1.00 |
Myalgia | 3 (30 %) | 0 | 0.250 |
Dry cough | 5 (50 %) | 4 (67 %) | 0.633 |
Dyspnea on exertion | 5 (50 %) | 5 (83 %) | 0.307 |
Fever | 9 (90 %) | 3 (50 %) | 0.118 |