Table 2.
Descriptive statistics for EBV ⩽ 4·74 and EBV > 4·74
| Variables | EBV ⩽ 4·74 n (%) (N = 10 320) | EBV > 4·74 n (%) (N = 2137) | P value Σ2 |
|---|---|---|---|
| Age mean (s.d.) | 3·13 (0·20) | 3·16 (0·23) | <0·001 |
| Sex | n = 10 320 | n = 2137 | 0·186 |
| Boy | 5260 (50·97) | 1055 (49·37) | |
| Girl | 5060 (49·03) | 1082 (50·63) | |
| Parents social class | n = 10 320 | n = 2137 | <0·001 |
| I | 4293 (41·60) | 741 (34·67) | |
| II | 1208 (11·71) | 250 (11·70) | |
| III | 687 (6·66) | 156 (7·30) | |
| IV | 913 (8·85) | 197 (9·22) | |
| V | 2121 (20·55) | 519 (24·29) | |
| Never worked – absent – missing | 1098 (10·64) | 274 (12·82) | |
| Equivalised income | n = 10 053 | n = 2075 | <0·001 |
| >0·75 and ⩽1 | 2902 (28·87) | 509 (24·53) | |
| >0·5 and ⩽0·75 | 3465 (34·47) | 662 (31·90) | |
| >0·25 and ⩽0·5 | 2713 (26·99) | 658 (31·71) | |
| ⩽0·25 | 973 (9·68) | 246 (11·86) | |
| Mother education | n = 9850 | n = 2035 | <0·001 |
| Higher/degree | 2894 (29·38) | 526 (25·85) | |
| A/As/S level | 959 (9·74) | 195 (9·58) | |
| GCSE | 4366 (44·32) | 878 (43·14) | |
| No qualification | 1631 (16·56) | 436 (21·43) | |
| Housing tenure | n = 9864 | n = 2040 | <0·001 |
| Own | 6258 (63·44) | 1116 (54·71) | |
| Rent privately | 803 (8·14) | 176 (8·63) | |
| Social housing | 2269 (23·00) | 585 (28·68) | |
| Other | 534 (5·41) | 163 (7·99) | |
| Number of room per person | n = 9869 | n = 2041 | <0·001 |
| No overcrowding | 7334 (74·31) | 1388 (68·01) | |
| Overcrowding | 2535 (25·69) | 653 (31·99) | |
| Childcare | n = 10 073 | n = 2090 | 0·423 |
| Home/nanny/others | 8949 (88·84) | 1870 (89·47) | |
| Crèche | 1124 (11·16) | 220 (10·53) | |
| Damp | n = 9860 | n = 2040 | 0·376 |
| No | 8567 (86·89) | 1757 (86·13) | |
| Yes | 1293 (13·11) | 283 (13·87) | |
| Temperature in baby's room | n = 9887 | n = 2041 | 0·103 |
| Warm/very warm/neither warm nor cold | 9278 (93·84) | 1895 (92·85) | |
| Cold/very cold | 609 (6·16) | 146 (7·15) | |
| Rural Urban environment | n = 9887 | n = 2041 | <0·001 |
| Large Urban | 7423 (75·08) | 1650 (80·84) | |
| Towns | 1334 (13·49) | 214 (10·49) | |
| Rural | 1130 (11·43) | 177 (8·67) |