| Store type | 2002 | 2003 | 2004 | 2005 | ||||
| n | Mean (SD) | n | Mean (SD) | n | Mean (SD) | n | Mean (SD) | |
| Convenience store with petrol | 125 | 19.3 (16.7) | 134 | 19.2 (15.5) | 135 | 23.6 (17.1) | 136 | 23.4 (16.1) |
| Convenience store without petrol | 37 | 28.1 (19.8) | 35 | 29.2 (14.6) | 35 | 33.5 (12.9) | 37 | 30.3 (13.5) |
| Large pharmacy | 47 | 20.3 (18.3) | 48 | 21.0 (24.5) | 49 | 22.3 (20.6) | 48 | 20.0 (20.2) |
| Petrol only | 30 | 14.5 (15.2) | 26 | 14.0 (11.6) | 26 | 18.7 (17.2) | 28 | 14.4 (13.0) |
| Liquor store | 95 | 29.2 (22.0) | 89 | 29.7 (22.6) | 94 | 31.9 (21.9) | 93 | 27.2 (20.4) |
| Corner store | 144 | 17.3 (18.9) | 133 | 18.9 (20.8) | 132 | 18.0 (21.6) | 133 | 15.9 (15.2) |
| Supermarket | 60 | 39.3 (51.3) | 61 | 26.7 (36.7) | 62 | 42.4 (45.3) | 61 | 48.9 (71.5) |
| Total | 538 | 23.2 (25.6) | 526 | 22.3 (22.5) | 533 | 26.1 (25.2) | 536 | 24.8 (30.4) |
*Adverts include interior and exterior signs, shelving units, displays, and interior and exterior functional items.
†Sample size refers to number of stores with valid data for at least one time point (for census tracts with more than one store, the store with data for most time points retained; if multiple stores had the same number of time points, one was randomly selected).