Characteristics | Group I | Group II | χ2 | P-value |
---|---|---|---|---|
(with HT) | (without HT) | |||
n = 187 | n = 817 | |||
Pathological TNM staging | 0.540 | 0.910 | ||
I | 160 (85.6) | 687 (84.1) | ||
II | 4 (2.1) | 25 (3.1) | ||
III | 15 (8.0) | 70 (8.6) | ||
IV | 8 (4.3) | 35 (4.3) | ||
Tumor size | 2.975 | 0.209 | ||
≤1 cm | 126 (67.4) | 496 (60.7) | ||
1 to 4 cm | 59 (31.6) | 304 (37.2) | ||
>4 cm | 2 (1.1) | 17 (2.1) | ||
Frequency of occult PTC | 2.872 | 0.090 | ||
Absent | 61 (32.6) | 321(39.3) | ||
Present | 126 (67.4) | 496 (60.7) | ||
Lymph nodes metastases | 0.227 | 0.634 | ||
Absent | 129 (69.0) | 578 (70.7) | ||
Present | 58 (31.0) | 239 (29.3) | ||
Distribution of positive lymph nodes | 4.703 | 0.427 | ||
Level VI | 49 (58.3) | 217 (54.5) | ||
Level II | 9 (10.7) | 33 (8.3) | ||
Level III | 9 (10.7) | 48 (12.1) | ||
Level IV | 10 (11.9) | 47 (11.8) | ||
Level V | 6 (7.1) | 52 (13.1) | ||
Level I | 1 (1.2) | 1 (0.3) | ||
Extrathyroidal invasion | 0.885 | 0.347 | ||
Absent | 184 (98.4) | 794 (97.2) | ||
Present | 3 (1.6) | 23 (2.8) | ||
Capsular infiltration | 0.891 | 0.345 | ||
Absent | 159 (85.0) | 671 (82.1) | ||
Present | 28 (15.0) | 146 (17.9) | ||
Vascular invasion | 0.429 | 0.512 | ||
Absent | 186 (99.5) | 815 (99.8) | ||
Present | 1 (0.5) | 2 (0.2) | ||
Distant metastases | 0 | 0 |