bordered on significancep = 0.053
Cox regression based on four groups of vitamin D levels, < 25 nmol/l, 25-49 nmol/l, 50-75 nmol/l and >75 nmol/l, did not show statistical significance in terms of mortality prediction in women ( p = 0.9) but it bordered on significance in men ( p = 0.053) when performed with other data as in Tables 2 and 4 , respectively.