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Table 2 Biochemical and biomarker variables (mean ± SD) at induction (0), after 4-month BT (4), and after 6 months from induction (6)

From: Dietary intake and stress fractures among elite male combat recruits

  NSF
(N = 62)
SF
(N = 12)
Month 0 4 6 0 4 6
HGB (g/dl) 15.7 ± 0.9 14.2 ± 0.9 14.2 ± 0.9 15.6 ± 0.5 14.6 ± 0.8 13.9 ± 1.0
Folic acid serum (ng/dl) 6.1 ± 2.6 3.9 ± 1.7 7.1 ± 2.5 7.1 ± 3.7+ 3.8 ± 1.9 7.0 ± 2.4
Calcium total (mg/dl) 10.1 ± 0.4 9.7 ± 0.4 9.8 ± 0.3* 9.9 ± 0.3Δ 9.6 ± 0.4 9.5 ± 0.2
Iron (μg/dl) 118.9 ± 51.4+ 65.4 ± 24.1 130.4 ± 71.5* 121.2 ± 53.8+ 66.8 ± 22.6 71.7 ± 27.2
Transferrin (mg/dl) 303.9 ± 48.2 306.0 ± 28.5 307.6 ± 41.4 264.0 ± 53.5 302.4 ± 67.5 295.9 ± 50.4
Ferritin (ng/ml) 54.3 ± 30.0 42.6 ± 22.5 22.8 ± 9.6 57.4 ± 30.2Δ 38.7 ± 19.0 31.9 ± 16.5
Transferrin saturation (%) 39.1 ± 12.7+ 21.4 ± 8.5 23.4 ± 9.2 41.1 ± 13.5+ 22.1 ± 11.7 24.2 ± 10.8
25(OH)D (nmol/L) 75.3 ± 16.3 64.6 ± 10.2 72.4 ± 13.8 70.5 ± 16.5 63.0 ± 12.4 66.4 ± 16.4
PTH (ng/L) 32.4 ± 14.9 50.2 ± 17.1 32.1 ± 19.9 31.9 ± 18.5 43.8 ± 17.8 37.4 ± 22.7
  1. * p < 0.05 NSF vs. SF at the same examination date
  2. + p < 0.05 at the same group, between induction and end of BT
  3. Δ p < 0.05 at the same group, between induction and 6-month