Table 2.
Estimated age standardised incidences (95% confidence intervals)* of thyroid cancer by methods of tumour detection, tumour size, and SEER summary stage, 1999, 2005, and 2008
| Variables | 1999 | 2005 | 2008 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Screening | Clinical | Unknown | Screening | Clinical | Unknown | Screening | Clinical | Unknown | |||
| Tumour size (mm): | |||||||||||
| <10 | 0.27 (0.22 to 0.31) | 0.49 (0.43 to 0.55) | 0.43 (0.37 to 0.49) | 4.80 (4.63 to 4.97) | 2.37 (2.25 to 2.49) | 1.59 (1.49 to 1.69) | 15.00 (14.70 to 15.29) | 4.88 (4.71 to 5.05) | 4.00 (3.84 to 4.15) | ||
| 10-20 | 0.32 (0.27 to 0.37) | 0.82 (0.74 to 0.90) | 0.50 (0.44 to 0.56) | 3.39 (3.25 to 3.54) | 2.41 (2.28 to 2.54) | 1.00 (0.92 to 1.08) | 6.86 (6.66 to 7.06) | 2.85 (2.72 to 2.98) | 1.63 (1.53 to 1.73) | ||
| 20-30 | 0.13 (0.10 to 0.16) | 0.76 (0.68 to 0.83) | 0.30 (0.26 to 0.35) | 0.67 (0.60 to 0.73) | 1.09 (1.00 to 1.17) | 0.39 (0.34 to 0.44) | 0.97 (0.90 to 1.05) | 0.89 (0.81 to 0.96) | 0.45 (0.40 to 0.50) | ||
| ≥30 | 0.17 (0.13 to 0.21) | 0.97 (0.88 to 1.06) | 0.32 (0.27 to 0.37) | 0.32 (0.28 to 0.37) | 1.05 (0.97 to 1.13) | 0.32 (0.28 to 0.37) | 0.61 (0.55 to 0.68) | 0.97 (0.89 to 1.05) | 0.42 (0.37 to 0.47) | ||
| Unspecified | 0.13 (0.10 to 0.16) | 0.30 (0.25 to 0.35) | 0.47 (0.41 to 0.53) | 0.21 (0.17 to 0.24) | 0.26 (0.21 to 0.30) | 0.59 (0.53 to 0.65) | 0.27 (0.23 to 0.31) | 0.18 (0.15 to 0.21) | 0.76 (0.69 to 0.83) | ||
| SEER summary stage: | |||||||||||
| Localised | 0.42 (0.36 to 0.48) | 1.16 (1.07 to 1.25) | 0.56 (0.49 to 0.62) | 4.16 (4.00 to 4.32) | 2.80 (2.66 to 2.93) | 1.19 (1.10 to 1.27) | 8.84 (8.61 to 9.07) | 3.76 (3.60 to 3.91) | 1.73 (1.63 to 1.83) | ||
| Regional | 0.37 (0.32 to 0.42) | 1.57 (1.46 to 1.68) | 1.04 (0.95 to 1.13) | 4.74 (4.57 to 4.91) | 3.90 (3.74 to 4.06) | 2.01 (1.89 to 2.12) | 14.15 (13.86 to 14.44) | 5.51 (5.33 to 5.70) | 4.50 (4.33 to 4.66) | ||
| Distant | 0.09 (0.06 to 0.12) | 0.21 (0.17 to 0.25) | 0.06 (0.03 to 0.08) | 0.17 (0.14 to 0.21) | 0.20 (0.17 to 0.24) | 0.03 (0.02 to 0.04) | 0.17 (0.14 to 0.20) | 0.19 (0.16 to 0.23) | 0.15 (0.12 to 0.18) | ||
| Unknown | 0.13 (0.10 to 0.16) | 0.39 (0.33 to 0.45) | 0.37 (0.32 to 0.42) | 0.32 (0.27 to 0.36) | 0.27 (0.23 to 0.31) | 0.67 (0.60 to 0.73) | 0.55 (0.49 to 0.60) | 0.30 (0.26 to 0.35) | 0.87 (0.80 to 0.95) | ||
| Total | 1.01 (0.89 to 1.13) | 3.34 (3.13 to 3.55) | 2.02 (1.86 to 2.18) | 9.39 (9.07 to 9.71) | 7.17 (6.89 to 7.45) | 3.89 (3.68 to 4.10) | 23.71 (23.22 to 24.20) | 9.76 (9.44 to 10.09) | 7.25 (6.98 to 7.52) | ||
SEER=Surveillance, Epidemiology, and End Results.
*Calculated per 100 000 population. Segi’s world standard population was used for age standardisation.