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Table 3 Comparison of hematological parameters

From: Habitual dietary protein intake affects body iron status in Japanese female college rhythmic gymnasts: a follow-up study

 

L group (n = 11)

H group (n = 9)

Baseline

Δ (baseline–follow-up)

Baseline

Δ (baseline–follow-up)

White blood cells (/μL)

5209 ± 1377 (4800)

−389 ± 996 (−872)

4800 ± 1236 (5200)

376 ± 1943 (−69)

Red blood cells (×104/μL)

428 ± 38 (429)

−12 ± 22 (−9)

437 ± 39 (443)

−14 ± 20 (−17)

Hemoglobin (g/dL)

12.9 ± 0.5 (12.8)

−1.2 ± 1.3 (−0.5)

13.5 ± 0.9 (13.6)

−0.3 ± 0.5 (−0.2)

Hematocrit (%)

38.7 ± 2.0 (38.7)

−2.8 ± 3.8 (−2.6)

40.2 ± 3.4 (40.3)

0.5 ± 1.6 (0.8)*

MCV (fl)

91.2 ± 5.2 (90.0)

−3.3 ± 8.2 (−3.7)

92.3 ± 2.1 (92.3)

2.0 ± 4.5 (1.1)

MCH (pg)

30.5 ± 2.3 (30.3)

−1.7 ± 2.8 (−0.9)

30.9 ± 1.0 (30.8)

−0.1 ± 1.7 (−0.1)

MCHC (%)

33.4 ± 1.0 (33.4)

−0.9 ± 1.7 (−0.5)

33.5 ± 0.8 (33.4)

−0.7 ± 1.3 (−0.4)

Reticulocytes (%)

13.6 ± 6.0 (12.0)

−3.3 ± 3.1 (−4.9)

7.6 ± 5.6 (6.0)*

−3.2 ± 2.5 (−3.5)

Total iron binding capacity (μg/dL)

348 ± 62 (357)

9 ± 55 (19)

317 ± 55 (314)

−19 ± 50 (−8)

Serum free iron (μg/dL)

67.2 ± 37.9 (60.0)

1.7 ± 63.0 (−8.1)

94.6 ± 38.7 (93.0)

5.0 ± 40.2 (−1.1)

Transferrin saturation (%)

21.1 ± 15.5 (15.0)

1.1 ± 21.4 (−5.8)

29.9 ± 11.2 (32.6)

2.9 ± 17.1 (−0.6)

Serum ferritin (ng/mL)

26.5 ± 17.0 (16.0)

−21.0 ± 9.8 (−20.6)

56.4 ± 29.5 (44.0)*

−16.3 ± 10.7 (−14.7)

Erythropoietin (mU/mL)

19.0 ± 5.3 (18.0)

15.0 ± 26.1 (6.4)

20.6 ± 4.4 (21.1)

0.6 ± 7.6 (1.8)

Haptoglobin (mg/dL)

25.4 ± 25.7 (11.0)

15.7 ± 30.6 (2.2)

30.7 ± 26.7 (22.0)

−4.9 ± 26.3 (−6.4)

  1. Values are expressed as mean ± SD (median)
  2. Δ (baseline–follow-up): delta changes were adjusted for baseline values using the residual method
  3. MCV mean corpuscular volume, MCH mean corpuscular hemoglobin, MCHC mean corpuscular hemoglobin concentration
  4. * p < 0.05; significantly different from the L group (Mann–Whitney U test)
  5.  p < 0.05; significantly different from baseline within-group (Wilcoxon Signed-rank test)