Deficiency (25(OH)D < 25 nmol/L): All 81% (63–100%)Secondary hyperparathyroidism (s–PTH >7.6 pmol/L): All 44% (31–58%)Boys 17% (4–29%)Girls 67% (43–91%)Level of 25(OH)D:Boys –13.7 nmol/LGirls –20.2 nmol/L. Here, PTH is linked to secondary hyperparathyroidism.