Table 3. Analytes stability comparison after a 24-hour storage period collected in the BD RST tube and the BD Barricor tube.
| Analyte, unit | N | BD RST 0’ | BD RST 24 h | Imprecision (%) | BD Barricor 0 | BD Barricor 24 h | Imprecision (%) | Desirable imprecision (%) |
|---|---|---|---|---|---|---|---|---|
| Sodium, mmol/L | 52 | 137 ± 3 | 137 ± 3 | 0.10 | 137 ± 3 | 137 ± 3 | 0.01 | 0.25 |
| Potassium, mmol/L | 52 | 4.4 ± 0.6 | 4.4 ± 0.7 | 1.74 | 4.2 ± 0.6 | 4.2 ± 0.6 | 1.76 | 2.05 |
| Calcium, mmol/L | 52 | 2.22 ± 0.16 | 2.22 ± 1.18 | 0.30 | 2.20 ± 0.15 | 2.21 ± 0.16 | 0.32 | 1.05 |
| Chloride, mmol/L | 52 | 104 ± 5 | 104 ± 5 | - 0.05 | 103 ± 5 | 104 ± 5 | - 0.24 | 0.55 |
| Glucose, mmol/L | 52 | 6.7 (6.2-7.6) | 6.7 (6.2-7.6) | - 0.92 | 6.9 (6.2-7.7) | 6.6 (5.9-7.3) | - 3.88 | 2.55 |
| CK, U/L | 52 | 89 (56-132) | 87 (57-131) | 0.06 | 90 (56-131) | 86 (55-128) | - 2.94 | 8.00 |
| CK-MB, U/L | 35 | 18 (13-20) | 15 (13-19) | - 7.73 | 16 (13-19) | 11 (10-16) | 4.26 | 9.90 |
| AST, U/L | 52 | 29 (20-36) | 29 (21-36) | 1.83 | 29 (20-36) | 31 (22-37) | 4.85 | 4.75 |
| ALT, U/L | 52 | 24 (19-30) | 24 (19-30) | 1.88 | 25 (20-28) | 25 (19-30) | 1.76 | 5.20 |
| ALP, U/L | 52 | 75 (65-84) | 75 (65-84) | - 0.81 | 74 (65-82) | 74 (62-79) | - 1.77 | 2.70 |
| LD, U/L | 52 | 211 (173-256) | 210 (170-249) | - 1.25 | 213 (188-262) | 223 (201-261) | 2.89 | 2.60 |
| GGT, U/L | 52 | 31 (25-36) | 31 (25-38) | 1.23 | 30 (24-34) | 30 (24-36) | 0.80 | 4.40 |
| Urea, mmol/L | 52 | 7.2 (6.3-8.5) | 7.3 (6.4-8.4) | 0.58 | 7.1 (6.3-8.4) | 7.2 (6.4-8.4) | 0.13 | 6.95 |
| Creatinine, μmol/L | 52 | 89 (79-104) | 92 (79-106) | 1.22 | 91 (80-106) | 92 (80-104) | 0.11 | 2.25 |
| Amylase, U/L | 52 | 60 (51-71) | 61 (51-71) | - 0.29 | 61 (51-71) | 60 (51-70) | - 0.78 | 3.30 |
| Uric acid, μmol/L | 52 | 387 ± 163 | 387 ± 166 | 0.01 | 388 ± 165 | 388 ± 164 | 0.17 | 4.30 |
| Total protein, g/L | 52 | 66.4 ± 7.7 | 66.5 ± 7.7 | 0.20 | 69.1 ± 7.2 | 69.0 ± 6.8 | - 0.14 | 1.30 |
| Albumin, g/L | 52 | 37.4 ± 6.7 | 37.2 ± 6.7 | - 0.49 | 37.4 ± 6.4 | 37.2 ± 6.4 | - 0.48 | 1.30 |
| CRP, mg/L | 52 | 6.6 (3.1-12-5) | 6.5 (3.0-12.6) | - 0.39 | 6.6 (3.0-12.3) | 6.3 (3.1-12.5) | - 0.90 | 16.75 |
| Bilirubin, μmol/L | 52 | 12 (10-14) | 12 (10-14) | - 3.40 | 12 (10-14) | 12 (10-14) | - 2.66 | 10.90 |
| Analyte, unit | N | BD RST 0’ | BD RST 24 h | Imprecision (%) | BD Barricor 0 | BD Barricor 24 h | Imprecision (%) | Desirable imprecision (%) |
| TnI, ng/L | 23 | 2903 (158-5386) | 2433 (157-5820) | - 2.71 | 2972 (172-5536) | 2790 (172-5793) | - 0.44 | 7.03 |
| Myoglobin, μg/L | 52 | 61 (50-81) | 60 (48-79) | - 0.59 | 60 (49-80) | 58 (47-79) | - 0.88 | 7.00 |
| TSH, mIU/L | 49 | 1.71 (0.927-2.55) | 1.70 (0.873-2.61) | - 2.10 | 1.70 (0.934-2.62) | 1.69 (0.922-2.63) | 0.60 | 7.95 |
| fT3, pmol/L | 45 | 3.90 (3.44-4.27) | 3.96(3.49-4.46) | 3.25 | 3.84 (3.42-4.50) | 4.07 (3.51-4.55) | 1.20 | 3.00 |
| fT4, pmol/L | 49 | 13.40 (12.98-14.28) | 13.68 (13.09-14.15) | 1.23 | 13.40 (12.95-14.06) | 13.78 (12.76-14.42) | 2.38 | 3.85 |
| Data are presented as mean ± standard deviation, and median (interquartile range). PB - Passing-Bablok. CI - confidence interval. CK - creatine kinase. CK-MB - creatine kinase isoenzyme MB. AST - aspartate aminotransferase. ALT - alanine aminotransferase. ALP - alkaline phosphatase. LD - lactate dehydrogenase. GGT – gamma-glutamyltransferase. CRP - C-reactive protein. TnI - troponin I. TSH - thyroid-stimulating hormone. fT3 - free triiodothyronine. fT4 - free thyroxine. | ||||||||