Numbers of children and mean ages with relevant weight/height data at Children in Focus clinic and routine child health records, and raw data for height/length and weight measurements
| CiF clinic | Children attending CiF clinic | No of children with PCHR weight data ±2 months of CiF clinic (%) | Mean (SD) weight, at CiF clinic, kg | Mean (SD) weight from PCHR, kg | No of children with PCHR length/height data ±2 months of CiF clinic (%) | Mean (SD) height, at CiF clinic, cm | Mean (SD) height from PCHR, cm | Mean (SD) age at CiF clinic, months | Mean (SD) age of PCHR measurement, months |
| 4 months | 1017 | 37.6 (382) | 6.5 (0.8) | 5.4 (0.9) | 33.9 (345) | 62.3 (2.2) | 58.6 (2.8) | 3.8 (0.1) | 2.1 (0.5) |
| 8 months | 1309 | 82.9 (1085) | 8.8 (1.0) | 9.2 (1.1) | 80.3 (1051) | 70.2 (2.4) | 72.1 (2.9) | 8.2 (0.2) | 9.1 (0.5) |
| 12 months | 1238 | 12.7 (157) | 10.3 (1.3) | 10.1 (1.3) | 11.2 (139) | 75.9 (2.7) | 75.5 (3.1) | 12.3 (0.2) | 11.6 (0.9) |
| 18 months | 1165 | 57.8 (673) | 11.4 (1.3) | 11.5 (1.3) | 55.7 (649) | 81.6 (2.9) | 82.3 (3.3) | 18.4 (0.3) | 18.5 (0.7) |
| 25 months | 1087 | 17.8 (194) | 12.8 (1.3) | 12.8 (1.4) | 16.8 (183) | 88.1 (2.6) | 87.8 (2.7) | 25.0 (0.2) | 24.3 (0.8) |
| 31 months | 1083 | 0.1 (1) | – | – | 0.1 (1) | – | – | – | – |
| 37 months | 1051 | 0.7 (7) | – | – | 0.7 (7) | – | – | – | – |
| 43 months | 1048 | 11.6 (122) | 16.1 (1.6) | 16.0 (1.8) | 11.7 (123) | 99.1 (3.3) | 99.4 (3.3) | 43.3 (0.3) | 43.1 (1.0) |
| 49 months | 1022 | 3.1 (32) | – | – | 3.1 (32) | – | – | – | – |
| 61 months | 985 | 0.0 (0) | – | – | 0.0 (0) | – | – | – | – |
CiF, Children in Focus (the name of the research clinic); PCHR, Personal Child Health Record (the name of the UK routine data source for child’s weight and height).