Table 3 Proportion of buffer types and sizes used among studies focusing on older adults vs. general population
Buffer type | Older adults (n = 17 buffer types used in 17 studies using buffers) n (%) | General population (n = 91 buffer types used in 82 studies using buffers) n (%) |
|---|---|---|
Street network buffer | 9 (53) | 47 (51.6) |
Circular buffer | 8 (47) | 42 (46.2) |
Sausage buffer | 0 (0) | 2 (2.2) |
Buffer size | Older adults (n = 20 buffer sizes used in 17 studies using buffers) n (%) | General population (n = 125 buffer sizes used in 82 studies using buffers) n (%) |
50 m | 0 (0) | 1 (1) |
200 m | 1 (5) | 1 (1) |
250 m | 0 (0) | 1 (1) |
400 m | 3 (15) | 9 (7) |
500 m | 3 (15) | 9 (7) |
600 m | 0 (0) | 1 (1) |
800 m | 1 (5) | 11 (9) |
1000 m | 5 (25) | 31 (25) |
1200 m | 0 (0) | 1 (1) |
1500 m | 0 (0) | 2 (2) |
1600 m | 0 (0) | 14 (11) |
1700 m | 0 (0) | 1 (1) |
2000 m | 1 (5) | 4 (3) |
2500 m | 1 (5) | 1 (1) |
3000 m | 5 (25) | 37 (30) |
4830 m | 0 (0) | 1 (1) |
Buffer size ≤ 1000 m or >  1000 m n (%) | ||
≤ 1000 m | 13 (65) | 64 (51) |
>  1000 m | 7 (35) | 61 (49) |