Table 1 Clinical characteristics of 542 PTC patients included in the present study
Clinical characteristics | Total No. (%) | Training No. (%) | Validation No. (%) | P | ||
|---|---|---|---|---|---|---|
Sex | Â | Â | Â | 0.70 | ||
 Female | 391 (72.14) | 276 (72.63) | 115 (70.99) |  | ||
 Male | 151 (27.86) | 104 (27.37) | 47 (29.01) |  | ||
Age (year) | Â | Â | Â | 0.79 | ||
 < 55 | 379 (69.93) | 267 (70.26) | 112 (69.14) |  | ||
 ≥ 55 | 163 (30.07) | 113 (29.74) | 50 (30.86) |  | ||
Dimension (median [p25, p75]) | 2.50 [1.50, 3.60] | 2.5 [1.50, 3.52] | 2.4 [1.50, 3.70] | 0.92 | ||
Multifocality | Â | Â | Â | 0.55 | ||
 No | 252 (46.49) | 173 (45.53) | 79 (48.77) |  | ||
 Yes | 222 (40.96) | 158 (41.58) | 64 (39.51) |  | ||
 NA | 68 (12.55) | 49 (13.09) | 19 (11.72) |  | ||
Bilaterality | Â | Â | Â | 0.92 | ||
 No | 362 (66.79) | 253 (66.58) | 109 (67.28) |  | ||
 Yes | 111 (20.48) | 77 (20.26) | 34 (20.99) |  | ||
 NA | 69 (12.73) | 50 (13.16) | 19 (11.73) |  | ||
Extrathyroidal invasion | Â | Â | Â | 0.40 | ||
 No | 300 (55.35) | 215 (56.58) | 85 (52.47) |  | ||
 Yes | 162 (29.89) | 110 (28.95) | 52 (32.10) |  | ||
 NA | 80 (14.76) | 55 (14.47) | 25 (15.43) |  | ||
Lymphocytic thyroiditis | Â | Â | Â | 0.11 | ||
 No | 340 (62.73) | 232 (61.05) | 108 (66.67) |  | ||
 Yes | 83 (15.31) | 64 (16.84) | 19 (11.73) |  | ||
 NA | 119 (21.96) | 84 (22.11) | 35 (21.60) |  | ||
Histological type | Â | Â | Â | 0.94 | ||
 Classic papillary | 366 (67.53) | 257 (67.63) | 109 (67.28) |  | ||
 Other subtypes | 176 (32.47) | 123 (32.37) | 53 (32.72) |  | ||
TDS (median [p25, p75]) | -0.02 [-0.36, 0.31] | -0.02 [-0.35, 0.32] | -0.04 [-0.37, 0.29] | 0.71 | ||
Excised cervical LN number | 6 [2, 16.5] | 6 [3.00, 15.75] | 5 [2.00, 19.00] | 0.65 | ||
(median [p25, p75]) | ||||||
Radioiodine Therapy | Â | Â | Â | 0.32 | ||
 No | 73 (13.47) | 46 (12.11) | 27 (16.67) |  | ||
 Yes | 142 (26.20) | 99 (26.05) | 43 (26.54) |  | ||
 NA | 327 (60.33) | 235 (61.84) | 92 (56.79) |  | ||
Preoperative LN scan | Â | Â | Â | 0.90 | ||
 No | 114 (21.03) | 79 (20.79) | 35 (21.60) |  | ||
 Yes | 336 (61.99) | 235 (61.84) | 101 (62.35) |  | ||
 NA | 92 (16.98) | 66 (17.37) | 26 (16.05) |  | ||
OS status | Â | Â | Â | 0.34 | ||
 Live | 437 (80.63) | 307 (80.79) | 130 (80.25) |  | ||
 Dead | 13 (2.39) | 7 (1.84) | 6 (3.70) |  | ||
 NA | 92 (16.98) | 66 (17.37) | 26 (16.05) |  | ||
Recurrence | Â | Â | Â | 0.60 | ||
 No | 396 (73.06) | 278 (73.16) | 118 (72.84) |  | ||
 Yes | 54 (9.96) | 36 (9.47) | 18 (11.11) |  | ||
 NA | 92 (16.98) | 66 (17.37) | 26 (16.05) |  | ||
CLNM | Â | Â | Â | 0.71 | ||
 No | 281 (51.85) | 199 (52.37) | 82 (50.62) |  | ||
 Yes | 261 (48.15) | 181 (47.63) | 80 (49.38) |  | ||
LLNM | Â | Â | Â | 0.49 | ||
 No | 412 (76.01) | 292 (76.84) | 120 (74.07) |  | ||
 Yes | 130 (23.99) | 88 (23.16) | 42 (25.93) |  | ||