Characteristics of the included 2802 5-year-old children with an isolated oral cleft
| N | % | |
| Type of cleft | ||
| CL | 767 | 27.4 |
| CP | 973 | 34.7 |
| UCLP | 773 | 27.6 |
| BCLP | 289 | 10.3 |
| Sex | ||
| Woman | 1157 | 41.3 |
| Man | 1645 | 58.7 |
| Ethnicity | ||
| White | 2252 | 80.4 |
| Asian | 170 | 6.1 |
| Black | 41 | 1.5 |
| Other | 81 | 3.0 |
| Unclassified | 249 | 8.9 |
| Missing | 9 | 0.3 |
| Major language | ||
| English | 2306 | 82.3 |
| Other | 227 | 8.1 |
| Missing | 269 | 9.6 |
| IDACI quintile | ||
| 1 (most deprived) | 685 | 24.5 |
| 2 | 613 | 21.9 |
| 3 | 543 | 19.4 |
| 4 | 500 | 17.8 |
| 5 (least deprived) | 414 | 14.8 |
| Missing | 47 | 1.7 |
| Free school meal eligibility | ||
| No | 2227 | 79.5 |
| Yes | 542 | 19.3 |
| Missing | 33 | 1.2 |
| SEN identified | ||
| No | 1954 | 69.7 |
| Yes | 815 | 29.1 |
| Missing | 33 | 1.2 |
BCLP, bilateral cleft lip and palate; CL, cleft lip; CP, cleft palate; IDACI, Income Deprivation Affecting Children Index; SEN, special educational needs; UCLP, unilateral cleft lip and palate.