Table 2.
Papillary thyroid cancer incidence rates and RR by SES and tumour size among fully insured cases, SEER registries, 2007–2010*
| SES | All cases |
≤2 cm tumours |
>2 cm tumors |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | Rate‡ | RR | 95% CI | N | Rate | RR | 95% CI | N | Rate | RR | 95% CI | |
| 26 392 | 18 539 | 6774 | ||||||||||
| Q1 (low) | 2664 | 4.6 | 1.0 | (Referent) | 1778 | 3.1 | 1.0 | (Referent) | 484 | 1.3 | 1.0 | (Referent) |
| Q2 | 4045 | 6.5 | 1.4 | (1.4 to 1.5) | 2722 | 4.4 | 1.4 | (1.3 to 1.5) | 1205 | 1.9 | 1.5 | (1.3 to 1.6) |
| Q3 | 5248 | 8.1 | 1.8 | (1.7 to 1.9) | 3643 | 5.6 | 1.8 | (1.7 to 1.9) | 1457 | 2.3 | 1.7 | (1.6 to 1.9) |
| Q4 | 6425 | 9.6 | 2.1 | (2.0 to 2.2) | 4573 | 6.8 | 2.2 | (2.1 to 2.3) | 1670 | 2.5 | 1.9 | (1.7 to 2.1) |
| Q5 (high) | 8011 | 11.6 | 2.6 | (2.4 to 2.7) | 5823 | 8.4 | 2.7 | (2.6 to 2.9) | 1958 | 2.9 | 2.2 | (2.0 to 2.4) |
| Trend for SES | <0.0001 | <0.0001 | 0.002 | |||||||||
*SEER 18 excluding Alaska and Louisiana and cases with unknown SES.
†Fully insured: private insurance; Fee-for-Service; Private Insurance: Managed care, Health Maintenance Organisation, or Preferred Provider Organisation; TRICARE; Medicare Administered through a Managed Care plan; Medicare with private supplement; Medicare with supplement, not otherwise specified; and Military; Other: Uninsured; Any Medicaid; Insured, No Specifics; and Insurance status unknown (SEER Nov 2012 Submission).
‡Age-adjusted rates adjusted to the 2000 US standard population.22
Q, quintile; RR, rate ratio; SEER, Surveillance, Epidemiology, and End Results; SES, socioeconomic status.