Table 2.
Multivariable Results Examining the Association Between Unhealthy Food Availability and Colorectal Cancer Incidence of Texas Census Tracts (n=5,215)
| Crude Incidence* | Overall | Male | Female | |
|---|---|---|---|---|
| Unhealthy Food Availability Quartiles | IRR (95% CI) | IRR (95% CI) | IRR (95% CI) | |
| Quartile 1 (Low) | 71.7 | REF | REF | REF |
| Quartile 2 | 71.3 | 1.03 (1.00, 1.05) | 1.03 (1.00, 1.07) | 1.03 (1.00, 1.06) |
| Quartile 3 | 72.7 | 1.02 (0.99, 1.05) | 1.04 (1.00, 1.07) | 1.01 (0.98, 1.05) |
| Quartile 4 (Highest) | 75.3 | 1.02 (0.99, 1.05) | 1.01 (0.98, 1.05) | 1.03 (1.00, 1.07) |
| p-Trend | 0.7 | 0.6 | 0.4 | |
| Percent White | ||||
| ≤50 | REF | REF | REF | |
| >50 to ≤75 | 0.94 (0.91, 0.97) | 0.98 (0.94, 1.02) | 0.90 (0.87, 0.94) | |
| >75 | 0.95 (0.92, 0.98) | 1.03 (0.99, 1.07) | 0.86 (0.83, 0.90) | |
| Percent Living Below Poverty | ||||
| ≤10 | REF | REF | REF | |
| >10 to ≤20 | 1.27 (1.24, 1.29) | 1.27 (1.24, 1.31) | 1.27 (1.23, 1.30) | |
| >20 | 1.39 (1.35, 1.42) | 1.43 (1.38, 1.48) | 1.35 (1.31, 1.39) | |
| Percent Male | ||||
| ≤50 | REF | REF | REF | |
| >50 | 0.94 (0.92, 0.96) | 0.91 (0.88, 0.93) | 0.96 (0.93, 0.98) | |
| Median Age | ||||
| ≤35 years | REF | REF | REF | |
| >35 years | 1.16 (1.14, 1.19) | 1.13 (1.10, 1.16) | 1.20 (1.17, 1.23) |
Models were also adjusted for calendar year (categorical: 2005–2015). Incidence Rate Ratios (IRR) were calculated by utilizing generalized estimating equations with Poisson distribution, log link function, and an exchangeable correlation structure. Offset statement was added for the log of census tract population 40 years of age and older to allow modeling number of cases as rates.
Bolded values indicate significant difference from reference group, p<0.05.
*
Note: Overall crude colorectal cancer incidence for 2010 is reported in rates per 100,000 persons.