Table 3.
The Relationship between Imaging and Thyroid Cancer Incidence: Analysis at the Regional Subgroup Level
| Linear Mixed Effects and Model Estimates |
Regional Subgroup Mean per Year* |
Estimate (Standard Error) |
P-value |
|---|---|---|---|
| Intercept | −4.18 (2.53) | 0.10 | |
| Imaging | |||
| None | 90.2% | REF | |
| Other Imaging | 9.2% | −1.88 (1.15) | 0.10 |
| Thyroid Ultrasound | 0.6% | 26.19 (6.37) | <0.001 |
| Time (Year) | 0.01 (0.01) | 0.14 | |
| Age | 76 | 0.08 (0.04) | 0.04 |
| Sex | |||
| Male | 42.3% | REF | |
| Female | 57.7% | −1.53 (1.14) | 0.18 |
| Race | |||
| White | 87.2% | REF | |
| Black | 7.7% | 0.02 (0.29) | 0.95 |
| Other | 5.1% | −0.32 (0.27) | 0.23 |
| Charlson-Deyo Comorbidity Index | 1.5 | 0.19 (0.12) | 0.13 |
| Rural-Urban Continuum | |||
| Metro | 47.1% | REF | |
| Adjacent to Metro | 30.7% | −0.02 (0.06) | 0.68 |
| Not Adjacent to Metro | 22.2% | 0.00 (0.06) | 0.98 |
| Education High School or Above | 84.6% | −0.58 (0.49) | 0.24 |
| Median Household Income | $48,381 | 0.03 (0.03) | 0.23 |
*
The regional subgroup mean per year is the aggregate of the means from the 153 regional subgroups.