Baseline Clinical and Vocal Characteristics of Study Population (n = 160)
| Characteristic | Total (n = 160) | TT (n = 54) | TT with 1.1–2.2 GBq (n = 64) | TT + ≥3.7 GBq (n = 42) | P |
| Mean age ± SD (y) | 48.8 ± 10.4 | 49. 1 ± 11.2 | 47.8 ± 10.4 | 49.9 ± 9.5 | 0.558 |
| Female (n) | 129 (80.6%) | 50 (92.6%) | 53 (82.9%) | 26 (61.9%) | 0.001 |
| T stage (n) | <0.001 | ||||
| T1a | 56 (35.0%) | 45 (83.3%) | 10 (15.6%) | 1 (2.4%) | |
| T1b | 10 (6.2%) | 3 (5.6%) | 5 (7.8%) | 2 (4.8%) | |
| T2 | 3 (1.9%) | 0 | 1 (1.6%) | 2 (4.8%) | |
| T3 | 91 (56.9%) | 6 (11.1%) | 48 (75.0%) | 37 (88.1%) | |
| N stage (n) | <0.001 | ||||
| N0 | 102 (63.8%) | 52 (96.3%) | 43 (67.2%) | 7 (16.7%) | |
| N1a | 58 (36.2%) | 2 (3.7%) | 21 (32.8%) | 35 (83.3%) | |
| Mean operation time ± SD (min) | 99.7 ± 28.6 | 101.5 ± 23.7 | 100.6 ± 34.9 | 96.05 ± 23.4 | 0.620 |
| GRBAS = 0 (n) | 79 (49.4%) | 32 (59.3%) | 24 (37.5%) | 23 (54.8%) | 0.365 |
| Mean acoustic ± SD | |||||
| Jitter (%) | 1.4 ± 1.0 | 1.4 ± 0.8 | 1.5 ± 1.0 | 1.3 ± 1.3 | 0.610 |
| Shimmer (%) | 4.0 ± 1.7 | 3.8 ± 1.6 | 4.1 ± 1.8 | 4.1 ± 1.6 | 0.875 |
| NHR (dB) | 0.1 ± 0.3 | 0.1 ± 0.0 | 0.1 ± 0.3 | 0.1 ± 0.0 | 0.162 |
| F0 (Hz*) | 198.8 ± 25.8 | 196.1 ± 32.5 | 201.3 ± 21.1 | 198.9 ± 19.6 | 0.592 |
| VRP (Hz*) | |||||
| Fmax | 625.6 ± 210.4 | 595.7 ± 199.5 | 643.6 ± 222.5 | 646.6 ± 206.5 | 0.441 |
| Fmin | 153.7 ± 25.0 | 152.5 ± 27.2 | 157.9 ± 23.1 | 147.7 ± 23.8 | 0.217 |
| VHI | 5.0 ± 11.4 | 5.1 ± 14.0 | 5.3 ± 10.3 | 4.3 ± 9.3 | 0.413 |
NHR = noise-to-harmonic ratio.