Table 2.
Cross-classification of BMIz levels at the first and second examinations among children who were severely obese (n =45 414) at their initial examination
| BMIz
|
%BMIp95a
|
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Second examination
|
Second examination
|
||||||||
| n | Initial category | <3.5 | 3.5–4.4 | ≥4.5 | Initial category | Low | Middle | High | |
| Boys | 4 202 | <3.5 | 52%b | 37% | 11% | 120–121 | 52% | 40% | 8% |
| 14 690 | 3.5–4.4 | 38% | 50% | 12% | 122–138 | 31% | 48% | 20% | |
| 2 115 | ≥4.5 | 10% | 66% | 24% | ≥139 | 6% | 35% | 59% | |
| 15 331 | <3.5 | 96% | 4% | 0.01% | 120–129 | 70% | 29% | 0.9% | |
| Girls | 8 745 | 3.5–4.4 | 73% | 27% | 0.1% | 130–154 | 28% | 63% | 9% |
| 331 | ≥4.5 | 39% | 58% | 3% | ≥155 | 2% | 49% | 50% | |
a
The sex-specific cut points for %BMIp95 at the first examination were chosen to make the number of children in each group equal to that in each BMIz group. Cut-points for %BMIp95 at the second examination correspond to those at the first examination: <122, 122–138 and ≥139 for boys, and <130, 130–154 and ≥155 for girls.
b
Values represent the percentage of children in each initial category who are in the specified category at the second examination.