Table 2. Mean baseline and 30-day freeze-thaw concentrations and percentage change from baseline for the biochemical analyte.
| Analyte | N | Mean baseline concentration (T 0 ) | Mean freeze-thaw concentration (T 1 ) | Mean % difference (95% CI) | p-Value |
|---|---|---|---|---|---|
| Abbreviations: CRP, C-reactive protein; HDL, high-density lipoprotein; LDL, low-density lipoprotein; TAG, triglycerides. Note: All concentrations are mean ± SD. Percentage differences were calculated using paired sample t -tests. p < 0.05. | |||||
| Cholesterol (mg/dL) | 70 | 167.09 ± 38.34 | 183.76 ±44.52 | 9.76 (8.41,11.10) | 0.000 |
| LDL (mg/dL) | 67 | 111.28 ±33.54 | 110.8 ± 33.54 | -0.67(− 2.16, 1.48) | 0.619 |
| Glucose (mg/dL) | 68 | 118.79 ±61.47 | 121.02 ± 62.09 | 1.93 (1.49, 2.38) | 0.000 |
| HDL (mg/dL) | 69 | 40.51 ± 7.5 | 43.47 ± 7.86 | 7.98 (5.33,10.84) | 0.000 |
| Serum creatinine (mg/dL) | 69 | 0.62 ± 0.15 | 0.61 ± 0.16 | 0.94 (− 2.09, 3.97) | 0.250 |
| Serum albumin (mg/dL) | 70 | 4.42 ± 0.31 | 4.46 ± 0.42 | 0.87 (− 0.55, 2.29) | 0.210 |
| Total protein (g/dL) | 70 | 7.85 ±0.48 | 7.92 ± 0.60 | 1.00 (− 0.34, 2.34) | 0.152 |
| Ferritin (ng/mL) | 61 | 77.52 ± 71.10 | 78.66± 75.74 | − 0.58 (− 3.44, 2.29) | 0.413 |
| TAG (mg/dL) | 70 | 171.76 ± 138.42 | 173.97 ± 120.46 | 2.82 (1.16,4.49) | 0.458 |
| CRP (mg/dL) | 67 | 3.97 ± 5.77 | 4.12 ± 5.99 | 3.45 (1.90,5.00) | 0.000 |
| Vitamin B12 (pg/mL) | 56 | 254.50 ± 103.61 | 242.75 ±103.61 | − 3.74 (− 6.81, − 3.37) | 0.010 |
| sTfR | 70 | 29.13 ± 39.38 | 27.66 ± 35.05 | − 5.49 (− 7.61, 23.48) | 0.040 |
| Vitamin D (ng/mL) | 60 | 12.98 ± 8.27 | 10.53 ± 4.96 | − 12.51(− 17.0, − 7.83) | 0.000 |