**5. Conclusions**

In conclusion, our study showed that obesity was independently associated with MME in Korean IgAN patients and these findings sugges<sup>t</sup> that obesity may have an important pathogenetic role in mesangial lesions in IgAN.

*J. Clin. Med.* **2020**, *10*, 2824

**Supplementary Materials:** The following are available online at http://www.mdpi.com/2077-0383/10/9/2824/s1, Figure S1: Flow chart of study design. Figure S2: Distribution of BMI according to age and sex categories. Bars of the BMI were divided by age (a) and sex categories (b). Table S1: Logistic regression analysis for BMI groups and MME in tubulointerstitial diseases from our kidney biopsy registry cohort (n = 80).

**Author Contributions:** Conceptualization, Y.A.H. and H.E.Y.; methodology, J.W.M., M.A.H. and E.S.K.; formal analysis, D.K. and W.J.C.; investigation, S.J.S., Y.K.C. and S.Y.K.; data curation, H.D.K., T.H.B., Y.S.K. and Y.K.K.; writing—original draft preparation, Y.A.H.; writing—review and editing, H.E.Y.; supervision, C.W.P., Y.O.K., and C.W.Y. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work was supported by the National Research Foundation of Korea (NRF) gran<sup>t</sup> funded by the Korea governmen<sup>t</sup> (MSIT) (2018R1C1B5045006) and Clinical Research Institute Grant (CMCDJ-P-2020-012) funded by the Catholic University of Korea Daejeon St. Mary's Hospital. The authors also wish to acknowledge the gran<sup>t</sup> funded by the Catholic Medical Center Research Foundation made in the program year of 2018.

**Acknowledgments:** We would like to thank the study coordinators So Yeon Kim, Young Mie Hwang, and Leeji Bae for their contributions to this study.

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