Table 1.
Characteristics of patients without connective tissue diseases
| Parameters | MPT positive | MPT negative |
|---|---|---|
| Total (n) | 49 (20.2%) | 194 (79.8%) |
| Gender (n) | ||
| Male | 28 | 125 |
| Female | 21* | 69 |
| Age [mean (SD)] | 70.3 (10.7) | 70.2 (11.0) |
| Smoking status (n) | ||
| Former, Current | 25 | 118 |
| Never | 24* | 76 |
| Pack-year [mean (SD)] | 29.3 (42.1) | 25.7 (37.4) |
| HRCT pattern (n) | ||
| UIP | 13 | 63 |
| f-NSIP | 22 | 75 |
| c-NSIP | 8 | 12 |
| AIP | 3 | 8 |
| COP | 0 | 27 |
| PPFE | 0 | 4 |
| RB-ILD | 0 | 2 |
| HP | 0 | 3 |
Data are presented as mean ± SD and number of patients as n. MPT, myositis panel test. HRCT pattern are indicated usual interstitial pneumonia (UIP), fibrotic non-specific interstitial pneumonia (f-NSIP), cellular non-specific interstitial pneumonia (c-NSIP), acute interstitial pneumonia (AIP), cryptogenic organizing pneumonia (OP), pleuroparenchimal fibroelastosis (PPFE), respiratory bronchiolitis-associated interstitial lung disease (RB-ILD), and hypersensitivity pneumonia (HP). *p<0.05.