TABLE 2—
Decomposition of Significant Tooth Loss in 1999 and the Difference in the Time Trend: Behavioral Risk Factor Surveillance System, United States, 1999–2010
| Mississippi Delta, Base Year (1999) |
Appalachia, Base Year (1999) |
Mississippi Delta, Time Trend |
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| Aged < 65 Years, Difference (% of Total Difference) | Aged ≥ 65 Years, Difference (% of Total Difference) | Aged < 65 Years, Difference (% of Total Difference) | Aged ≥ 65 Years, Difference (% of Total Difference) | Aged < 65 Years, Difference (% of Total Difference) | Aged ≥ 65 Years, Difference (% of Total Difference) | |
| Total difference | 0.029 (100) | 0.059 (100) | 0.062 (100) | 0.134 (100) | 0.004 (100) | 0.007 (100) |
| Unexplained difference | 0.007 (23) | 0.014 (24) | 0.039 (63) | 0.091 (68) | 0.003 (72) | 0.005 (71) |
| Explained difference | 0.023 (77) | 0.045 (76) | 0.023 (37) | 0.043 (32) | 0.001 (28) | 0.002 (29) |
| Individual | ||||||
| Age | –0.005 (–17) | –0.005 (–9) | 0.004 (7) | –0.001 (–1) | 0.001 (17) | 0.0004 (6) |
| Race/ethnicity | 0.014 (47) | 0.022 (38) | 0.004 (6) | 0.002 (2) | 0.0000 (1) | –0.0002 (–3) |
| Income | 0.009 (30) | 0.006 (10) | 0.006 (10) | 0.014 (10) | –0.0002 (–4) | 0.001 (9) |
| Education | 0.005 (18) | 0.028 (48) | 0.004 (7) | 0.031 (23) | 0.0002 (4) | 0.001 (7) |
| Smoking | –0.001 (–3) | –0.006 (–10) | 0.003 (4) | –0.007 (–5) | 0.0002 (6) | 0.0001 (1) |
| County | ||||||
| Fluoride in water | –0.001 (–2) | –0.003 (–4) | 0.002 (3) | 0.004(3) | 0.0001 (2) | 0.0001 (2) |
| Dental offices | 0.003 (11) | 0.021 (36) | 0.003 (4) | 0.017 (12) | 0.0001 (3) | 0.001 (10) |
| Population, land area | –0.002 (–6) | –0.019 (–33) | –0.002 (–3) | –0.016 (–12) | 0.0000 (–1) | –0.0002 (–3) |
Note. This table shows an accounting of the difference between Appalachia, the Mississippi Delta, and the rest of the country. The base year columns decompose the base year differences in both regions, and the time trend columns decompose the difference in the time trend in the Mississippi Delta. The first row shows the total difference between Appalachia, the Mississippi Delta, and the rest of the country. The second row shows the amount of difference that is unexplained after including the explanatory variables. The third row shows the amount that is explained by all the explanatory variables. The subsequent rows show the portion explained by each group of explanatory variables. There was no statistically significant time trend for Appalachia; therefore, there is no decomposition.