*3.6. Clinical Outcomes According to CONUT Score*

Using Kaplan–Meier curves, a significant better PFS was observed in Group 1 patients when compared to Group 2 (22.5 vs. 5.0 months, *p* < 0.0001, Figure 2a). Similarly, the OS was longer in Group 1 than Group 2 (35.1 vs. 9.2 months, *p* < 0.0001, Figure 2b). All but one patient died for thyroid disease, confirming a better disease specific survival in Group 1 than in Group 2.

**Figure 2.** Kaplan–Meier curve for PFS (**a**) and OS (**b**) according to the CONUT cut-off of 3.

We also performed a sub-analysis of PFS and OS according to the histology. Prognostic power of the CONUT score was still valid in DTC patients (OS: HR 1609, 95% CI 1.232–2.12, *p* < 0.0001; PFS: HR 1.505, 95% CI 1.186–1.908, *p* = 0.001), but not in MTC and PDTC patients, probably due to the small cohort of patients in these two groups.
