Table 4.
Percentiles of height and body mass index in the pooled sample of NI636 children.
| Anthropometry | Height (cm) (n = 122) | Height (SDS) (n = 122) | BMI (kg/m2) (n = 390) | BMI (SDS) (n = 390) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P50 | P25 | P75 | P50 | P25 | P75 | P50 | P25 | P75 | P50 | P25 | P75 | ||
| F | 6 mo | - | - | - | - | - | - | 17.1 | 16.0 | 18.1 | 0.23 | −0.82 | 0.89 |
| M | 6 mo | - | - | - | - | - | - | 17.3 | 16.1 | 18.2 | 0.11 | −1.06 | 0.76 |
| F | 9 mo | - | - | - | - | - | - | 17.0 | 15.9 | 17.9 | 0.23 | −0.48 | 0.88 |
| M | 9 mo | - | - | - | - | - | - | 17.1 | 16.0 | 18.0 | 0.11 | −0.71 | 0.76 |
| F | 12 mo | - | - | - | - | - | - | 16.8 | 15.8 | 17.7 | 0.23 | −0.36 | 0.87 |
| M | 12 mo | - | - | - | - | - | - | 16.9 | 15.9 | 17.8 | 0.11 | −0.60 | 0.75 |
| F | 18 mo | - | - | - | - | - | - | 16.5 | 15.6 | 17.3 | 0.23 | −0.27 | 0.86 |
| M | 18 mo | - | - | - | - | - | - | 16.6 | 15.6 | 17.4 | 0.11 | −0.51 | 0.74 |
| F | 24 mo | 87.2 | 84.9 | 90.0 | 0.41 | −0.40 | 1.19 | 16.1 | 15.3 | 17.0 | 0.23 | −0.25 | 0.85 |
| M | 24 mo | 88.0 | 86.4 | 91.0 | 0.22 | −0.27 | 1.15 | 16.3 | 15.4 | 17.1 | 0.11 | −0.48 | 0.73 |
| F | 36 mo | 95.0 | 91.8 | 98.0 | 0.05 | −0.81 | 0.82 | 15.5 | 14.9 | 16.2 | 0.23 | −0.22 | 0.83 |
| M | 36 mo | 95.8 | 93.3 | 99.0 | −0.14 | −0.68 | 0.78 | 15.6 | 14.9 | 16.3 | 0.11 | −0.46 | 0.71 |
p > 0.05 for sex at all percentiles. Values are point estimates from multivariable quantile regression using age and sex as predictors (see Statistical Analysis). Abbreviations: BMI = body mass index; F = females; M = males; mo = month; P25 = 25th percentile; P50 = 50th percentile; P75 = 75th percentile; SDS = standard deviation scores.