Table 2.
Results of various sensitivity analysis involving the removal of outlier points.
| Maximum median distance | Median travel distance before vaccination (km; IQR) | Coefficient before vaccination (95% CI) | Constant before vaccination (95% CI) | Median travel distance after vaccination (km; IQR) | Coefficient after vaccination (95% CI) | Constant after vaccination (95% CI) |
| Unrestricted (primary analysis) | 9.05 (8.06 to 11.34) | –0.041 (–0.051 to –0.031) | 6.90 (6.02 to 7.79) | 10.08 (8.60 to 12.42) | 0.061 (0.021 to 0.100) | 8.00 (5.59 to 10.40) |
| 50 km | 9.07 (8.06 to 11.34) | –0.041 (–0.051 to –0.031) | 6.90 (6.02 to 7.79) | 10.07 (8.59 to 12.21) | 0.034 (0.014 to 0.055) | 8.83 (7.63 to 10.00) |
| 25 km | 9.05 (8.05 to 11.32) | –0.037 (–0.046 to –0.028) | 7.10 (6.29 to 7.90) | 10.07 (8.58 to 12.07) | 0.028 (0.011 to 0.046) | 9.01 (7.95 to 10.10) |
| 19.1 km (vaccination day) | 9.05 (8.05 to 11.29) | –0.035 (–0.044 to –0.026) | 7.18 (6.40 to 7.97) | 10.07 (8.58 to 12.06) | 0.029 (0.011 to 0.046) | 9.01 (7.95 to 10.10) |