Mean frequency of independent exposures per day and week with 95% CIs in parenthesis
| Income deprivation quintiles | Weekday | Weekend | Week |
| All income levels | 5.2 (4.2 to 6.1) | 8.5 (6.9 to 10.2) | 42.7 (35.2 to 50.1) |
| 1 (most deprived) | 18.1 (11.6 to 24.5) | 27.3 (15.3 to 39.3) | 149.2 (96.5 to 201.9) |
| 2 | 8.2 (5.1 to 11.3) | 12.9 (7.8 to 17.9) | 63.3 (42.8 to 83.8) |
| 3 | 3.4 (1.6 to 5.2) | 7.0 (3.1 to 10.9) | 30.5 (14.8 to 46.2) |
| 4 | 4.0 (2.2 to 5.8) | 5.9 (4.1 to 7.8) | 32.5 (20.3 to 44.7) |
| 5 (least deprived) | 2.7 (2.0 to 3.4) | 5.0 (3.8 to 6.3) | 22.8 (18.4 to 27.3) |
| Analysis of variance | P<0.001 | P<0.001 | P<0.001 |