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Table 2 Distance separating questionnaire activity locations from GPS tracks and GPS activity locations (n = 23) and prompted recall locations (n = 31) collected in Montreal, Canada in 2011
| Distance in meters separating a questionnaire location from … | ||||||
|---|---|---|---|---|---|---|
| … closest point on GPS track (n = 23) | … closest GPS activity location (n = 23) | … closest prompted recall location (n = 31) | ||||
| Questionnaire activity purpose | na | Median (IQRb) | n | Median (IQR) | n | Median (IQR) |
| All purposes | 23 | 5 (1, 24) | 23 | 90 (27, 382) | 31 | 9 (1, 146) |
| Home | 23 | 1 (0.4, 3) | 23 | 22 (13, 45) | 31 | 1 (1, 2) |
| Studies | 8 | 5 (1, 24) | 8 | 77 (39, 118) | 12 | 111 (6, 291) |
| Work1 | 19 | 3 (1, 5) | 19 | 65 (35, 101) | 24 | 1 (0.09, 21) |
| Work2 | 5 | 0.7 (0.3, 10) | 5 | 22 (9, 1,411) | 8 | 2 (1, 669) |
| Grocery shopping1 | 22 | 16 (6, 37) | 22 | 140 (58, 387) | 31 | 19 (1, 197) |
| Grocery shopping2 | 20 | 13 (4, 65) | 20 | 334 (125, 488) | 23 | 110 (47, 371) |
| Sports | 16 | 2 (1, 21) | 16 | 202 (25, 573) | 20 | 56 (1, 214) |
| Leisure | 10 | 7 (1, 200) | 10 | 169 (24, 778) | 12 | 26 (2, 167) |
| Other1 | 15 | 14 (1, 347) | 15 | 96 (21, 762) | 19 | 19 (0.08, 398) |
| Other2 | 9 | 10 (1, 510) | 9 | 320 (39, 1476) | 11 | 300 (16, 1248) |
