Sugar | No. children with bruises at each site | 511 | Pre-cruisers | Ant tibia/knee | 3 |
| | | Forehead | 3 |
| | | | Scalp | 3 |
| | | | Upper leg | 1 |
| | 101 | Cruisers | Ant tibia/knee | 12 |
| | | | Forehead | 3 |
| | | | Scalp | 5 |
| | | | Upper leg | 1 |
| | 318 | Walkers | Ant tibia/knee | 142 |
| | | | Forehead | 18 |
| | | | Scalp | 2 |
| | | | Upper leg | 13 |
| | | | | |
Wedgwood | % of total bruising at each site | 11 | No better than crawling | 0 | |
| 8 | Cruisers | Knees shins | 86% |
| | | | Head | 14% |
| | 16 | Walk on flat/crawl upstairs | Knees/shins | 68% |
| | | | Head | 11% |
| | | | Arms | 13% |
| | | | Lower back | 0 |
| | 37 | Walking/walk upstairs both feet on stair | Knees/shins | 62% |
| | | | Head | 5% |
| | | | Arms | 25% |
| | | | Lower back | 5% |
| | 13 | Walkers | Knees/shins | 49% |
| | | | Head | 11% |
| | | | Arms | 17% |
| | | | Lower back | 18% |
| | | | | |
Mortimer | No. children with bruise at each site | 4 | Crawlers and pre-crawlers | Head and face | 3 |
| | | Arm | 1 |
| | 2 | Walkers | Shins | 2 |
| | | | Fore head | 1 |