Table 7. Combined effect of block group spatial accessibility to mammography service and socioeconomic (SES) deprivation on risk of late-stage breast cancer.
| Odds Ratio (95% CI) | ||||
| Socioeconomic Condition | SA measures | Joint-Classified | Stratified | |
| Model 1: CSTa | ||||
| Less deprived | ||||
| More accessible | 1.00 | 1.00 | ||
| Less accessible | 1.03 (0.87 to 1.22) | 1.03 (0.87 to 1.22) | ||
| More deprived | ||||
| More accessible | 1.26 (0.99 to 1.60) | 1.00 | ||
| Less accessible | 1.17 (0.91 to 1.49) | 0.92 (0.73 to 1.17) | ||
| Model 2: CST5b | ||||
| Less deprived | ||||
| More accessible | 1.00 | 1.00 | ||
| Less accessible | 0.97 (0.82 to 1.15) | 0.97 (0.82 to 1.15) | ||
| More deprived | ||||
| More accessible | 1.23 (0.97 to 1.56) | 1.00 | ||
| Less accessible | 1.11 (0.87 to 1.42) | 0.91 (0.72 to 1.15) | ||
| Model 3: DENc | ||||
| Less deprived | ||||
| More accessible | 1.00 | 1.00 | ||
| Less accessible | 0.82 (0.69 to 0.97) | 0.82 (0.69 to 0.97) | ||
| More deprived | ||||
| More accessible | 0.99 (0.78 to 1.27) | 1.00 | ||
| Less accessible | 1.10 (0.88 to 1.38) | 1.11 (0.87 to 1.41) | ||
| Model 4: SAUd | ||||
| Less deprived | ||||
| More accessible | 1.00 | 1.00 | ||
| Less accessible | 1.15 (0.96 to 1.39) | 1.15 (0.96 to 1.39) | ||
| More deprived | ||||
| More accessible | 1.20 (0.95 to 1.51) | 1.00 | ||
| Less accessible | 1.27 (1.03 to 1.57) | 1.06 (0.83 to 1.36) | ||
| Model 5: SACe | ||||
| Less deprived | ||||
| More accessible | 1.00 | 1.00 | ||
| Less accessible | 1.15 (0.97 to 1.36) | 1.15 (0.97 to 1.36) | ||
| More deprived | ||||
| More accessible | 1.25 (0.99 to 1.57) | 1.00 | ||
| Less accessible | 1.27 (1.02 to 1.59) | 1.02 (0.80 to 1.30) | ||
| Model 6: SA3Qf | ||||
| Less deprived | ||||
| More accessible | 1.00 | 1.00 | ||
| Less accessible | 1.15 (0.98 to 1.35) | 1.15 (0.98 to 1.35) | ||
| More deprived | ||||
| More accessible | 1.30 (1.03 to 1.64) | 1.00 | ||
| Less accessible | 1.26 (1.00 to 1.57) | 0.96 (0.76 to 1.23) | ||
| Model 7: SA3Sg | ||||
| Less deprived | ||||
| More accessible | 1.00 | 1.00 | ||
| Less accessible | 1.17 (0.99 to 1.37) | 1.17 (0.99 to 1.37) | ||
| More deprived | ||||
| More accessible | 1.32 (1.05 to 1.65) | 1.00 | ||
| Less accessible | 1.23 (0.98 to 1.53) | 0.93 (0.73 to 1.18) | ||
| Model 8: SA6Qh | ||||
| Less deprived | ||||
| More accessible | 1.00 | 1.00 | ||
| Less accessible | 1.19 (1.02 to 1.40) | 1.19 (1.02 to 1.40) | ||
| More deprived | ||||
| More accessible | 1.26 (1.00 to 1.59) | 1.00 | ||
| Less accessible | 1.34 (1.07 to 1.69) | 1.06 (0.84 to 1.35) | ||
| Model 9: SA6Si | ||||
| Less deprived | ||||
| More accessible | 1.00 | 1.00 | ||
| Less accessible | 1.27 (1.07 to 1.50) | 1.27 (1.07 to 1.50) | ||
| More deprived | ||||
| More accessible | 1.27 (1.01 to 1.61) | 1.00 | ||
| Less accessible | 1.32 (1.07 to 1.64) | 1.04 (0.81 to 1.32) | ||
All models were adjusted for age and race; “more accessible” means shorter travel time and bigger score values in density and 2SFCA measures, while “less accessible” means longer travel time and smaller score values in density and 2SFCA measures.
: shortest travel time (minutes);
: average travel time to the nearest five facilities (minutes);
: service density;
: spatial accessibility index from the model without weighting parameter;
: spatial accessibility index from the model with continuous weighting parameter;
: spatial accessibility index from the zonal weighted model with 3 time zones and quick decay weighting;
: spatial accessibility index from the zonal weighted model with 3 time zones and slow decay weighting;
: spatial accessibility index from the zonal weighted model with 6 time zones and quick decay weighting;
: spatial accessibility index from the zonal weighted model with 6 time zones and slow decay weighting.