Age-adjusted association of the ponderal index at birth categorized into thirds with fasting serum insulin and blood glucose levels and insulin sensitivity, stratified by duration of vigorous LTPA
| Ponderal index categories | Vigorous LTPA <25 min/week (n = 133) | Vigorous LTPA ≥25 min/week (n = 134) |
|---|---|---|
| Fasting serum insulin levels (mU/l) | ||
| <26.31 kg/m3 | 14.3 (12.1–16.5) | 10.5 (8.9–12.0) |
| 26.31–27.72 kg/m3 | 9.8 (7.6–12.0) | 10.3 (8.5–12.1) |
| >27.72 kg/m3 | 10.4 (8.4–12.4) | 9.5 (7.8–11.2) |
| P value, lowest versus upper two thirds | 0.002 | 0.56 |
| P for the interaction between physical activity and thinness at birth | 0.033 | |
| Fasting blood glucose levels (mmol/l) | ||
| <26.31 kg/m3 | 4.70 (4.54–4.85) mg/dl, 84.7 | 4.50 (4.37–4.63) mg/dl, 81.1 |
| 26.31–27.72 kg/m3 | 4.54 (4.39–4.70) mg/dl, 81.8 | 4.45 (4.29–4.60) mg/dl, 81.2 |
| >27.72 kg/m3 | 4.51 (4.36–4.65) mg/dl, 81.3 | 4.54 (4.39–4.68) mg/dl, 81.8 |
| P value, lowest versus upper two-thirds | 0.15 | 0.94 |
| P for the interaction between physical activity and thinness at birth | 0.33 | |
| Insulin sensitivity index | ||
| <26.31 kg/m3 | 0.474 (0.455–0.493) | 0.492 (0.476–0.507) |
| 26.31–27.72 kg/m3 | 0.496 (0.477–0.515) | 0.503 (0.484–0.521) |
| >27.72 kg/m3 | 0.496 (0.479–0.513) | 0.504 (0.487–0.521) |
| P value, lowest versus upper two-thirds | 0.049 | 0.22 |
| P for the interaction between physical activity and thinness at birth | 0.50 |
Data are means (95% CI).