**5. Conclusions**

The diagnosis of NTM lung infection in dust-exposed workers was significantly associated with previous TB, bronchiectasis, marked profusion of small opacities, and high-grade large opacities, as assessed using the ILO classification system. Even after adjustment, extensive small-opacity profusion and high-grade large opacities remained significant risk factors for NTM lung infection in dust-exposed workers. The relationship between pneumoconiosis features and NTM species, and the relationship between lung function and NTM lung infection remain to be studied.

**Author Contributions:** The research was designed and conducted by J.M. J.L. participated in the data collection. J.L. and J.M. reviewed the radiology. Statistical analysis was performed by J.L. All authors edited and revised the final submission and signed off on the final version.

**Funding:** This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.

**Conflicts of Interest:** The authors declare no conflict of interest.
