Mean duration of exposure per average day and week with 95% CIs in parenthesis
| Income deprivation quintiles | Weekday | Weekend | Week |
| All income levels | 2.7 (1.9 to 3.4) | 4.7 (3.4 to 5.9) | 22.7 (16.8 to 28.6) |
| 1 (most deprived) | 7.3 (4.6 to 10.0) | 13.0 (5.8 to 20.2) | 63.4 (38.7 to 88.1) |
| 2 | 5.8 (1.9 to 9.7) | 9.2 (4.1 to 14.3) | 45.6 (17.6 to 73.7) |
| 3 | 2.4 (0.1 to 4.7) | 4.5 (1.1 to 7.9) | 21.1 (2.5 to 39.8) |
| 4 | 1.5 (0.9 to 2.2) | 3.1 (1.5 to 4.7) | 14.0 (9.3 to 18.7) |
| 5 (least deprived) | 1.4 (0.8 to 1.9) | 2.2 (1.4 to 3.0) | 11.3 (7.4 to 15.1) |
| Analysis of variance | P<0.001 | P<0.001 | P<0.001 |