Comparison between groups assessed—age at assessment, availability of questionnaires, and family information
| Umbilical artery EDFV pattern | ||||
|---|---|---|---|---|
| Forward | Absent | Reversed | Total | |
| *p=0.03, reversed versus absent; p=0.005, reversed versus forward. | ||||
| Number of children | 40 | 27 | 9 | 76 |
| Age assessed (months) | ||||
| Mean | 94 | 92.9 | 79.8* | 91.9 |
| SD | 22.5 | 0.3 | 9.1 | 22.3 |
| Range | 63–151 | 63–142 | 67–93 | 63–151 |
| Parent questionnaire returned | ||||
| No. | 36 | 22 | 8 | 66 |
| (%) | (90) | (81) | (89) | (87) |
| Teacher questionnaire returned | ||||
| No. | 28 | 19 | 8 | 55 |
| (%) | (70) | (70) | (89) | (72) |
| Mother's age leaving full time education | ||||
| Mean | 17.2 | 17.6 | 16.7 | 17.3 |
| SD | 2.1 | 2.9 | 0.8 | 2.3 |
| Father's age leaving full time education | ||||
| Mean | 17.5 | 17.8 | 17.9 | 17.7 |
| SD | 2.7 | 3.2 | 3 | 2.9 |
| English not first language | ||||
| No. | 2 | 0 | 1 | 3 |
| (%) | (5) | (11) | (4) | |
| Single parent family | ||||
| No. | 7 | 3 | 2 | 12 |
| (%) | (18) | (11) | (22) | (16) |