Table 3. Characteristics of PTCs from 2008 to 2013.
| 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | Total | P for difference | P for trend | |
|---|---|---|---|---|---|---|---|---|---|
| Age(year) | 43.5 ± 14.8 | 43.5 ± 13.9 | 45.9 ± 14.7 | 44.5 ± 13.7 | 43.5 ± 13.1 | 43.5 ± 13.1 | 44.0 ± 13.6 | ||
| Male, n(%) | 29(21.2%) | 31(21.2%) | 42(18.3%) | 49(17.7%) | 87(23.9%) | 106(19.3%) | 344(20.2%) | 0.394 | 0.976 |
| Female, n(%) | 108(78.8%) | 115(78.8%) | 188(81.7%) | 228(82.3%) | 277(76.1%) | 444(80.7%) | 1360(79.8%) | ||
| Mean Diameter(mm)* | 17.8 ± 14.3 | 16.8 ± 11.9 | 16.6 ± 12.2 | 15.4 ± 11.2 | 14.4 ± 11.8 | 12.2 ± 9.5a,b | 14.6 ± 11.5 | <0.001 | |
| crPTC, n(%) | 78(56.9%) | 94(64.4%) | 141(61.3%) | 154(55.6%) | 183(50.3%) | 239(43.5%a,b) | 889(52.2%) | <0.001 | <0.001 |
| mPTC, n(%) | 59(43.1%) | 52(35.6%) | 89(38.7%) | 123(44.4%) | 181(49.7%) | 311(56.5%a,b) | 815(47.8%) | <0.001 | <0.001 |
| Postive LNM, n(%) | 37(27.0%) | 51(34.9%) | 73(31.7%) | 84(30.3%) | 122(33.5%) | 167(30.4%) | 534(31.3%) | 0.659 | 0.907 |
| Negative LNM, n(%) | 32(23.4%) | 37(25.3%) | 49(21.3%) | 48(17.3%) | 80(22.0%) | 134(24.4%) | 380(22.3%) | 0.276 | 0.703 |
| No LN Resected, n(%) | 68(49.6%) | 58(39.7%) | 108(47.0%) | 145(52.3%) | 162(44.5%) | 249(45.3%) | 790(46.4%) | 0.158 | 0.670 |
| Total | 137 | 146 | 230 | 277 | 364 | 550 | 1704 |
ameans percentages were significantly different compared with previous year; bmeans percentages were significantly different compared with the year 2008; crPTC, clinical relevant papillary thyroid carcinoma; mPTC, micro papillary thyroid carcinoma; LNM, lymph node metastasis; LN, lymph node.
*Data were presented as mean ± SD.