Table 1.
Differences in baseline characteristics for ALSPAC children with complete data by URI categories
| Urban | Town | Village | Hamlet | |||||
|---|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | n | % | |
| Total | 4623 | 81·43 | 390 | 6·87 | 488 | 8·60 | 176 | 3·10 |
| Gender | ||||||||
| Boy (n 2817) | 2281 | 49·34 | 198 | 50·77 | 246 | 50·41 | 92 | 52·27 |
| Girl (n 2860) | 2342 | 50·66 | 192 | 49·23 | 242 | 49·59 | 84 | 47·73 |
| χ 2=0·968 (P=0·809) | ||||||||
| Maternal education | ||||||||
| Low (n 1105) | 987 | 21·35 | 43 | 11·03 | 51 | 10·45 | 24 | 13·64 |
| Middle (n 2022) | 1698 | 36·73 | 131 | 33·59 | 150 | 30·74 | 43 | 24·43 |
| High (n 2550) | 1938 | 41·92 | 216 | 55·38 | 287 | 58·81 | 109 | 61·93 |
| χ 2=108·722 (P<0·001) | ||||||||
| Maternal age at delivery (years) | ||||||||
| <25 (n 716) | 628 | 13·58 | 32 | 8·21 | 38 | 7·79 | 18 | 10·23 |
| 25–29 (n 2306) | 1893 | 40·95 | 162 | 41·54 | 202 | 41·39 | 49 | 27·84 |
| 30–34 (n 1951) | 1550 | 33·53 | 148 | 37·95 | 183 | 37·50 | 70 | 39·77 |
| 35+ (n 704) | 552 | 11·94 | 48 | 12·31 | 65 | 13·32 | 39 | 22·16 |
| χ 2=46·556 (P<0·001) | ||||||||
| Highest parental social class | ||||||||
| I (n 932) | 689 | 14·90 | 67 | 17·18 | 120 | 24·59 | 56 | 31·82 |
| II (n 2583) | 2018 | 43·65 | 213 | 54·62 | 269 | 55·12 | 83 | 47·16 |
| III non-manual (n 1398) | 1238 | 26·78 | 73 | 18·72 | 67 | 13·73 | 20 | 11·36 |
| III manual (n 551) | 489 | 10·58 | 28 | 7·18 | 25 | 5·12 | 9 | 5·11 |
| IV & V (n 213) | 189 | 4·09 | 9 | 2·31 | 7 | 1·43 | 8 | 4·55 |
| χ 2=154·247 (P<0·001) | ||||||||
| Home ownership status | ||||||||
| Owned/mortgaged (n 5122) | 4145 | 89·66 | 358 | 91·79 | 458 | 93·85 | 161 | 91·48 |
| Rented privately/other (n 124) | 96 | 2·08 | 11 | 2·82 | 13 | 2·66 | 4 | 2·27 |
| Rented from council or housing association (n 431) | 382 | 8·26 | 21 | 5·38 | 17 | 3·48 | 11 | 6·25 |
| χ 2=19·013 (P=0·004) | ||||||||
ALSPAC, Avon Longitudinal Study of Parents and Children; URI, urban/rural indicator.