Table 2 Blood biomarker characteristics of the participants (n = 26)
From: Blood biomarkers for estimating energy intake in Japanese male collegiate athletes: a pilot study
Blood biomarker | Mean (SD) | Median (Q1, Q3) | Shapiro–Wilk test | Correlationa | |
|---|---|---|---|---|---|
p | r | p | |||
Serum protein | |||||
Total protein (g/dL) | 7.1 (0.36) | 7.1 (6.8, 7.2) | 0.539 | -0.077 | 0.710 |
Albumin (g/dL) | 4.47 (0.21) | 4.4 (4.3, 4.6) | 0.151 | -0.234 | 0.250 |
Pre-albumin (mg/dL) | 27.0 (4.82) | 27.1 (23.6, 29.9) | 0.871 | -0.171 | 0.404 |
Amino acid and nitrogen-compound | |||||
Uric acid (mg/dL) | 6.2 (1.1) | 6.2 (5.4, 7.1) | 0.751 | -0.025 | 0.902 |
eGFRcreat (mL/min) | 95.3 (10.9) | 94.6 (88.5, 103.4) | 0.804 | 0.030 | 0.884 |
Creatinine (mg/dL) | 0.89 (0.09) | 0.90 (0.83, 0.94) | 0.908 | -0.022 | 0.917 |
Urea nitrogen (mg/dL) | 13.1 (2.6) | 12.6 (11.4, 14.6) | 0.498 | -0.119 | 0.564 |
Iron metabolism | |||||
Transferrin (mg/dL) | 235 (29) | 235 (217, 261) | 0.676 | 0.074 | 0.718 |
Ferritin (ng/dL) | 87.9 (42.3) | 92.3 (45.6, 123.3) | 0.510 | -0.293 | 0.147 |
Total iron-binding capacity (μg /dL) | 314 (32) | 317 (286, 337) | 0.438 | 0.128 | 0.532 |
Unsaturated iron-binding capacity (μg /dL) | 191 (60) | 198 (149, 228) | 0.436 | 0.038 | 0.853 |
Iron (μg/dL) | 124 (47) | 114 (94, 154) | 0.070 | 0.039 | 0.850 |
Serum enzyme | |||||
Aspartate transaminase (U/L)b | 23 (6) | 23 (19, 25) | 0.003 | 0.353 | 0.077 |
Alanine transaminase (U/L)b | 18 (9) | 17 (13, 22) | 0.012 | 0.136 | 0.507 |
γ-glutamyl transpeptidase (U/L) | 18 (4) | 18 (15, 20) | 0.238 | 0.300 | 0.137 |
Glucose metabolism | |||||
Glucose (mg/dL) | 88 (7) | 88 (84, 93) | 0.286 | 0.099 | 0.631 |
Insulin (μIU/mL)b | 6.76 (2.86) | 5.93 (5.24, 8.03) | 0.008 | -0.293 | 0.147 |
HbA1c (%)b | 5.0 (0.2) | 5.0 (4.9, 5.2) | 0.016 | -0.088 | 0.668 |
Serum lipid | |||||
Total cholesterol (mg/dL) | 161 (28) | 157 (136, 181) | 0.182 | -0.416 | 0.034 |
High-density lipoprotein cholesterol (mg/dL) | 57 (11) | 54 (49, 67) | 0.420 | 0.074 | 0.720 |
Low-density lipoprotein cholesterol (mg/dL)b | 96 (25) | 89 (76, 111) | 0.025 | -0.469 | 0.016 |
Triglycerides (mg/dL)b | 76 (37) | 63 (49, 91) | 0.007 | -0.366 | 0.066 |
Blood cell | |||||
White blood cell count (/μL)b | 5885 (1450) | 5450 (4850, 6425) | 0.041 | -0.482 | 0.013 |
Red blood cell count (× 104 /μL) | 507 (24) | 507 (489, 520) | 0.684 | -0.218 | 0.285 |
Hemoglobin (g/dL) | 15.3 (0.6) | 15.3 (15.0, 15.6) | 0.210 | -0.132 | 0.520 |
Hematocrit (%) | 45.1 (1.7) | 45.5 (44.1, 45.9) | 0.074 | -0.186 | 0.362 |
Mean corpuscular volume (fL) | 88.9 (2.51) | 89.1 (87.5, 90.6) | 0.485 | -0.112 | 0.587 |
Mean corpuscular hemoglobin (pg) | 30.1 (1.2) | 30.0 (29.4, 31.3) | 0.496 | -0.021 | 0.917 |
Mean corpuscular hemoglobin concentration (%) | 34.0 (0.9) | 34.0 (33.2, 34.6) | 0.431 | 0.088 | 0.668 |
Platelet count (× 104 /μL) | 24.7 (3.4) | 24.8 (22.5, 27.2) | 0.857 | 0.051 | 0.803 |
Pituitary hormone | |||||
Insulin-like growth factor 1 (ng/mL) | 217 (54) | 207 (180, 249) | 0.163 | -0.327 | 0.103 |
Thyroid hormone | |||||
Free triiodothyronine (pg/mL) | 3.81 (0.32) | 3.75 (3.58, 4.01) | 0.160 | 0.602 | 0.001 |
Adrenal cortex hormone | |||||
Cortisol (μg/dL) | 11.43 (2.60) | 11.70 (8.83, 13.48) | 0.200 | 0.168 | 0.411 |
Gonadal hormone | |||||
Estradiol (pg/mL) | 33.2 (11.0) | 32.9 (26.2, 39.5) | 0.779 | 0.020 | 0.921 |
Testosterone (ng/mL) | 6.70 (1.95) | 6.53 (5.33, 8.47) | 0.901 | 0.185 | 0.366 |
Other bioactivity | |||||
Leptin (ng/mL)b | 4.6 (1.7) | 4.4 (3.3, 5.2) | 0.007 | -0.182 | 0.374 |