Table 1.
Selection and inclusion of participants, by region
| Population-based registers | ||||||||||||||||||||||
| North England | West Sweden | Northern Ireland | South East France | South West | East Denmark | Central Italy | South West France | All registers | North West Germany | ALL | ||||||||||||
| No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | |||
| Study population | 437 | 290 | 284 | 125 | 127 | 396 | 108 | 117 | 1,884 | 75 | 1,959 | |||||||||||
| Walking ability as recorded by the registry: | ||||||||||||||||||||||
| Walks unaided | 254 | 198 | 187 | 63 | 72 | 246 | 43 | 65 | 1,127 | |||||||||||||
| Walks using aids | 86 | 46 | 45 | 19 | 18 | 57 | 28 | 34 | 333 | - | - | |||||||||||
| Unable to walk | 97 | 46 | 52 | 43 | 37 | 92 | 35 | 18 | 420 | - | - | |||||||||||
| Unknown | - | - | - | - | - | - | 2 | - | 2 | - | - | |||||||||||
| Initial sample* | 186 | (43) | 220 | (76) | 203 | (71) | 125 | (100) | 127 | (100) | 165 | (42) | 108 | (100) | 117 | (100) | 1,251 | 75 | - | 1,326 | ||
| Walking ability as recorded by the registry: | ||||||||||||||||||||||
| Walks unaided | 87 | 128 | 106 | 63 | 72 | 80 | 43 | 65 | 644 | |||||||||||||
| Walks using aids | 50 | 46 | 45 | 19 | 18 | 38 | 28 | 34 | 278 | - | - | |||||||||||
| Unable to walk | 49 | 46 | 52 | 43 | 37 | 47 | 35 | 18 | 327 | - | - | |||||||||||
| Unknown | - | - | - | - | - | - | 2 | - | 2 | - | - | |||||||||||
| Excluded after sampling** | 8 | (4) | 4 | (2) | 4 | (2) | 4 | (3) | 19 | (15) | 22 | (13) | 10 | (9) | 6 | (5) | 77 | (6) | - | 77 | (6) | |
| Dead | 0 | 2 | 1 | 1 | 3 | 10 | 3 | 1 | 21 | - | 21 | |||||||||||
| Misdiagnosed | 4 | 1 | 3 | 3 | 4 | 2 | 2 | 0 | 19 | - | 19 | |||||||||||
| Moved out of area | 4 | 1 | 0 | 0 | 5 | 7 | 4 | 4 | 25 | - | 25 | |||||||||||
| Parental language difficulty | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 1 | 4 | - | 4 | |||||||||||
| Other | 0 | 0 | 0 | 0 | 7 | 0 | 1 | 0 | 8 | - | 8 | |||||||||||
| Final sample** | 178 | (96) | 216 | (98) | 199 | (98) | 121 | (97) | 108 | (85) | 143 | (87) | 98 | (91) | 111 | (95) | 1,174 | (94) | 75 | (100) | 1,249 | (94) |
| Responders† | 116 | (65) | 83 | (38) | 102 | (51) | 67 | (55) | 98 | (91) | 115 | (80) | 85 | (87) | 77 | (69) | 743 | (63) | 75 | (100) | 818 | (65) |
| Non-responders† | 62 | (35) | 133 | (62) | 97 | (49) | 54 | (45) | 10 | (9) | 28 | (20) | 13 | (13) | 34 | (31) | 431 | (37) | - | 431 | (35) | |
Percentages are relative to number in: * study population; ** initial sample; † final sample.
a One child was excluded as the walking ability was not recorded.
b Born outwith specified dates of birth and over 6 months outside specified age range on interview date.