| IIM | 42/67 (62.7%) |
| Only weak MSA/MAA | 9 (13.4%) |
| Only strong MSA/MAA | 27 (40.3%) |
| Both weak and strong MSA/MAA | 6 (9.0%) |
| CTD without IIM | 41/120 (34.2%) |
| Only weak MSA/MAA | 13 (10.8%) |
| Only strong MSA/MAA | 18 (15.0%) |
| Both weak and strong MSA/MAA | 10 (8.3%) |
| Non-IIM/CTD | 38/155 (24.5%) |
| Only weak MSA/MAA | 22 (14.2%) |
| Only strong MSA/MAA | 13 (8.4%) |
| Both weak and strong MSA/MAA | 3 (1.9%) |
| Any positive MSA/MAA across all diagnostic groups | 121 (35.4%) |
- IIM idiopathic inflammatory myopathy, CTD connective tissue disease, MSA myositis-specific autoantibody, MAA myositis-associated autoantibody
