| All participating children N (%) | Children with no PLS N (%) | Children with full data available for the main analysis N (%) |
Female | 377 (47) | 213 (47) | 164 (46) |
Male | 419 (52) | 230 (51) | 189 (53) |
Gender not known | 15 (2) | 11 (2.4) | 4 (1) |
First-born | 345 (42) | 197 (43) | 148 (42) |
Age (months), mean (SD)*** | 25.5 (1.7) | 25.2 (1.8) | 25.8 (1.5) |
English only spoken at home*** | 495 (61) | 247 (54) | 248 (70) |
Another language only spoken at home | 119 (15) | 85 (19) | 34 (9) |
English plus another language spoken at home | 83 (10) | 51 (11) | 32 (9) |
Language spoken at home not known | 114 (14) | 71 (16) | 43 (12) |
IDACI decile,† mean (SD)*** | 4.8 (2.5) | 4.4 (2.4) | 5.2 (2.6) |
SSLM word count, median (IQR) | 27 (26) | 26 (22) | 29 (29) |
ASQ-3 score, mean (SD) | 48.3 (16.4) | 48.7 (15.9) | 47.8 (16.9) |
Respondent—mother | 763 (94) | 426 (94) | 337 (94) |
Total | 811 | 454 | 357 |
Characteristics of children with full data and those without the PLS assessment were compared using independent t-tests, analysis of variance, Mann-Whitney or χ2 tests.
*P<0.05, **P<0.01, ***P<0.001.
†IDACI taken from the family home postcode. The lower the IDACI decile, the more disadvantaged the post code.
ASQ-3, Ages and Stages Questionnaire, Third Edition; IDACI, Income Deprivation Affecting Children Index; PLS, Preschool Language Scale; SSLM, Sure Start Language Measure.