Table 1.
Descriptive Characteristics of “Radiogenic” and “Sporadic” PTC
| Children (4 to <14 years at surgery) | Adolescents (15 to 18 years at surgery) | Adults (≥19 to 28 years at surgery) | All cases (4–28 years at surgery) | |||||
|---|---|---|---|---|---|---|---|---|
| Radiogenic (n = 121) | Sporadic (n = 60) | Radiogenic (n = 66) | Sporadic (n = 54) | Radiogenic (n = 114) | Sporadic (n = 80) | Radiogenic (n = 301) | Sporadic (n = 194) | |
| Characteristics | n (%) or mean (SD)a | n (%) or mean (SD) | n (%) or mean (SD) | n (%) or mean (SD) | n (%) or mean (SD) | n (%) or mean (SD) | n (%) or mean (SD) | n (%) or mean (SD) |
| Female | 72 (59.5) | 49 (81.7) | 44 (66.7) | 39 (72.2) | 86 (75.4) | 67 (83.8) | 202 (67.1) | 155 (79.9) |
| Male | 49 (40.5) | 11 (18.3) | 22 (33.3) | 15 (27.8) | 28 (24.6) | 13 (16.2) | 99 (32.9) | 39 (20.1) |
| Age at exposure, years | 1.9 (1.2) | — | 1.6 (1.1) | — | 2.0 (1.3) | — | 1.9 (1.2) | — |
| Age at surgery, years | 11.5 (2.4) | 12.6 (2.1) | 16.7 (1.1) | 17.0 (1.0) | 23.9 (3.1) | 23.0 (2.5) | 16.9 (6.0) | 17.6 (4.9) |
| Oblast | ||||||||
| Kievb | 53 (43.8) | 41 (68.3) | 19 (28.8) | 42 (77.8) | 54 (47.4) | 66 (82.4) | 126 (41.9) | 149 (76.8 |
| Chernihiv | 35 (28.9) | 9 (15.0) | 23 (34.8) | 7 (13.0) | 44 (38.6) | 7 (8.8) | 102 (33.9) | 23 (11.9) |
| Zhytomyr | 33 (27.3) | 10 (16.7) | 24 (36.4) | 5 (9.2) | 16 (14.0) | 7 (8.8) | 73 (24.2) | 22 (11.3) |
| 131I thyroid dose, mGy | 984.0 (2113.3) | — | 1333.3 (3438.4) | — | 667.5 (1409.2) | — | 940.7 (2271.3) | — |
| CTB dose group | ||||||||
| 1 | 9 (7.4) | — | 12 (18.2) | — | 26 (22.8) | — | 47 (15.6) | — |
| 2 | 1 (0.8) | — | 2 (3.0) | — | 2 (1.8) | — | 5 (1.7) | — |
| 3-1 | 66 (54.6) | — | 19 (28.8) | — | 40 (35.1) | — | 125 (41.5) | — |
| 3-2 | 15 (12.4) | — | 8 (12.1) | — | 9 (7.9) | — | 32 (10.6) | — |
| 3-3 | 30 (24.8) | — | 25 (37.9) | — | 37 (32.4) | — | 92 (30.6) | — |
a
% for count data, SD for thyroid dose.
b
Including Kiev city for sporadic cases.
PTC, papillary thyroid carcinoma; SD, standard deviation; 131I, radioactive iodine; CTB, Chernobyl Tissue Bank.