Relative risks from full model by county median income (above or below national median)
| Youth dependency ratio | Proportion of live-in grandparents who care for their grandchildren | Gini index | ||
| Overall | High-income counties | 1.00 (0.34, 2.92) | 1.27 (0.66, 2.46) | 0.83 (0.67, 1.02) |
| Low-income counties | 0.95 (0.63, 1.43) | 1.62 (1.34, 1.95)*** | 1.10 (1.00, 1.22) | |
| 65–74 years | High-income counties | 1.75 (0.62, 4.95) | 1.32 (0.69, 2.52) | 0.85 (0.66, 1.09) |
| Low-income counties | 1.12 (0.72, 1.73) | 1.57 (1.29, 1.92)*** | 1.20 (1.08, 1.32)*** | |
| 75–84 years | High-income counties | 0.84 (0.29, 2.48) | 1.15 (0.59, 2.27) | 0.79 (0.63, 0.99)* |
| Low-income counties | 0.90 (0.60, 1.35) | 1.55 (1.29, 1.87)*** | 1.10 (1.00, 1.21) | |
| 85+ years | High-income counties | 0.58 (0.20, 1.70) | 1.07 (0.53, 2.15) | 0.81 (0.64, 1.02) |
| Low-income counties | 0.74 (0.49, 1.13) | 1.48 (1.21, 1.80)*** | 1.07 (0.96, 1.19) |
*p<0.05; **p<0.01; ***p<0.001.
All models controlled for log of population density, spatial location and seasonal variability.