pISSN 2234-3806eISSN 2234-3814
Number of data points, average absolute PBIAS, and PNR for each test item and instrument according to three data categories
| Analyte | Instrument | Measured data without conversion action |
Data before (measured) |
||||||
|---|---|---|---|---|---|---|---|---|---|
| N (%) |
Average absolute PBIAS (95% CI) |
PNR (% PNR) |
N (%) | Measured results | Converted results | ||||
| Average absolute PBIAS (95% CI) |
PNR (% PNR) |
Average absolute PBIAS (95% CI) | PNR (% PNR) |
||||||
| AST | Ci16000 |
338 (78) | 8.1 (7.5–8.6) | 1.5 (1.2) | 94 (22) | 49.6 (48.3–51.0) | 64.9 (14.1) | 7.1 (5.6–8.6) | 3.2 (0.7) |
| Vista1 |
0 (0) | 432 (100) | 11.6 (10.4–12.8) | 25.5 (25.5) | 7.2 (6.4–8.1) | 3.9 (3.9) | |||
| Vista2 |
0 (0) | 432 (100) | 12.1 (10.8–13.3) | 26.6 (26.6) | 7.6 (6.7–8.5) | 5.1 (5.1) | |||
| Vitros |
2 (0) | 12.5 | 0.0 (0.0) | 430 (100) | 9.9 (9.3–10.5) | 19.5 (19.4) | 4.9 (4.3–5.4) | 0.9 (0.9) | |
| ALT | Ci16000 |
401 (93) | 5.2 (4.7–5.8) | 0.0 (0.0) | 31 (7) | 104.3 | 67.7 (4.9) | 23.4 | 29.0 (2.1) |
| Vista1 |
0 (0) | 432 (100) | 31.6 (29.9–33.4) | 75.5 (75.5) | 9.7 (8.5–10.8) | 2.3 (2.3) | |||
| Vista2 |
0 (0) | 432 (100) | 30.8 (29.2–32.4) | 72.5 (72.5) | 9.3 (8.2–10.4) | 2.5 (2.5) | |||
| Vitros |
2 (0) | 9.3 | 0.0 (0.0) | 430 (100) | 14.7 (13.4–16.0) | 23.7 (23.6) | 9.0 (7.9–10.1) | 1.4 (1.4) | |
| ALP | Ci16000 |
98 (23) | 5.1 (4.4–5.7) | 0.0 (0.0) | 334 (77) | 12.5 (11.6–13.4) | 22.8 (17.6) | 4.0 (3.5–4.5) | 0.0 (0.0) |
| Vista1 |
0 (0) | 432 (100) | 4.5 (4.1–4.9) | 1.2 (1.2) | 4.1 (3.6–4.5) | 0.0 (0.0) | |||
| Vista2 |
0 (0) | 432 (100) | 4.6 (4.3–5.0) | 1.9 (1.9) | 4.2 (3.7–4.7) | 0.7 (0.7) | |||
| Vitros |
0 (0) | 432 (100) | 9.2 (8.5–9.9) | 24.1 (24.1) | 7.2 (6.5–7.9) | 5.1 (5.1) | |||
| ALB | Ci16000 |
372 (86) | 2.3 (2.0–2.6) | 3.5 (3.0) | 60 (14) | 16.5 (16.2–16.7) | 11.7 (1.6) | 4.7 (3.9–5.5) | 23.3 (3.2) |
| Vista1 |
18 (4) | 4.6 | 27.8 (1.2) | 414 (96) | 7.3 (6.9–7.6) | 58.9 (56.5) | 3.5 (3.2–3.8) | 12.8 (12.3) | |
| Vista2 |
18 (4) | 5.7 | 44.4 (1.9) | 414 (96) | 7.6 (7.2–7.9) | 60.4 (57.9) | 3.3 (3.0–3.6) | 11.4 (10.9) | |
| Vitros |
169 (39) | 3.0 (2.4–3.5) | 6.5 (2.5) | 263 (61) | 5.3 (4.9–5.7) | 17.1 (10.4) | 3.3 (2.9–3.7) | 8.0 (4.9) | |
| TP | Ci16000 |
372 (86) | 1.4 (1.2–1.5) | 0.0 (0.0) | 60 (14) | 9.7 (9.5–9.8) | 0.0 (0.0) | 1.4 (1.0–1.8) | 0.0 (0.0) |
| Vista1 |
292 (68) | 1.8 (1.6–2.1) | 2.7 (1.9) | 140 (32) | 6.3 (6.1–6.5) | 12.9 (4.2) | 3.0 (2.6–3.3) | 12.9 (4.2) | |
| Vista2 |
292 (68) | 1.5 (1.2–1.7) | 1.4 (0.9) | 140 (32) | 5.3 (5.1–5.5) | 7.9 (2.5) | 3.1 (2.7–3.4) | 8.6 (2.8) | |
| Vitros |
290 (67) | 1.6 (1.4–1.8) | 2.4 (1.6) | 142 (33) | 5.4 (5.2–5.6) | 7.7 (2.5) | 2.5 (2.1–2.9) | 4.9 (1.6) | |
| Na | Ci16000 | 432 (100) | 1.0 (0.9–1.1) | 0.9 (0.9) | 0 (0) | ||||
| Vista1 |
294 (68) | 1.0 (0.9–1.1) | 3.4 (2.3) | 138 (32) | 2.9 (2.8–3.0) | 2.9 (0.9) | 1.1 (0.9–1.2) | 3.6 (1.2) | |
| Vista2 |
294 (68) | 1.0 (0.9–1.2) | 5.4 (3.7) | 138 (32) | 3.1 (3.0–3.2) | 9.4 (3.0) | 1.2 (1.0–1.4) | 5.1 (1.6) | |
| Vitros |
398 (92) | 1.1 (1.0–1.3) | 6.5 (6.0) | 34 (8) | 15.7 | 55.9 (4.4) | 1.0 | 2.9 (0.2) | |
| K | Ci16000 | 432 (100) | 1.1 (0.9–1.2) | 0.2 (0.2) | 0 (0) | ||||
| Vista1 | 432 (100) | 2.0 (1.9–2.2) | 0.0 (0.0) | 0 (0) | |||||
| Vista2 | 432 (100) | 2.0 (1.9–2.2) | 0.7 (0.7) | 0 (0) | |||||
| Vitros |
0 (0) | 432 (100) | 2.1 (1.9–2.3) | 3.7 (3.7) | 1.4 (1.2–1.6) | 0.5 (0.5) | |||
| Cl | Ci16000 | 432 (100) | 0.9 (0.8–1.0) | 0.7 (0.7) | 0 (0) | ||||
| Vista1 |
4 (1) | 3.8 | 75.0 (0.7) | 428 (99) | 2.3 (2.2–2.5) | 28.0 (27.8) | 1.2 (1.0–1.3) | 0.9 (0.9) | |
| Vista2 |
4 (1) | 2.4 | 0.0 (0.0) | 428 (99) | 2.1 (1.9–2.2) | 21.0 (20.8) | 1.3 (1.1–1.4) | 2.6 (2.5) | |
| Vitros |
10 (3) | 12.5 | 20.0 (0.6) | 306 (97) | 1.3 (1.1–1.4) | 3.6 (3.5) | 1.2 (1.0–1.4) | 2.6 (2.5) | |
| Ca | Ci16000 | 198 (46) | 1.6 (1.3–1.8) | 2.0 (0.9) | 234 (54) | 3.6 (3.4–3.8) | 10.3 (5.6) | 1.8 (1.5–2.0) | 2.6 (1.4) |
| Vista1 |
0 (0) | 432 (100) | 4.1 (3.8–4.4) | 45.8 (45.8) | 1.9 (1.7–2.1) | 5.6 (5.6) | |||
| Vista2 |
0 (0) | 432 (100) | 4.3 (4.0–4.6) | 48.4 (48.4) | 2.0 (1.8–2.2) | 6.3 (6.3) | |||
| Vitros |
0 (0) | 432 (100) | 5.7 (5.5–6.0) | 66.9 (66.9) | 2.1 (1.8–2.3) | 8.6 (8.6) | |||
| P | Ci16000 | 432 (100) | 3.9 (3.6–4.2) | 0.0 (0.0) | 0 (0) | ||||
| Vista1 |
0 (0) | 432 (100) | 2.9 (2.5–3.2) | 0.0 (0.0) | 4.4 (4.1–4.7) | 0.0 (0.0) | |||
| Vista2 |
0 (0) | 432 (100) | 3.0 (2.7–3.4) | 0.0 (0.0) | 4.4 (4.0–4.7) | 0.2 (0.2) | |||
| Vitros |
0 (0) | 432 (100) | 10.0 (9.5–10.5) | 11.3 (11.3) | 4.6 (4.1–5.0) | 0.2 (0.2) | |||
| Chol | Ci16000 |
0 (0) | 432 (100) | 2.3 (2.0–2.6) | 0.0 (0.0) | 2.2 (2.0–2.5) | 0.0 (0.0) | ||
| Vista1 |
378 (88) | 3.0 (2.7–3.4) | 0.8 (0.7) | 54 (13) | 24.4 (24.0–24.7) | 3.7 (0.5) | 4.1 (3.2–5.1) | 0.0 (0.0) | |
| Vista2 |
378 (88) | 2.5 (2.2–2.8) | 0.0 (0.0) | 54 (13) | 20.6 (20.3–20.9) | 1.9 (0.2) | 3.5 (2.7–4.3) | 0.0 (0.0) | |
| Vitros |
374 (87) | 2.4 (2.1–2.7) | 0.0 (0.0) | 58 (13) | 18.8 (18.5–19.1) | 0.0 (0.0) | 3.0 (2.0–3.9) | 0.0 (0.0) | |
| Cr | Ci16000 |
0 (0) | 432 (100) | 5.9 (5.3–6.5) | 15.8 (15.8) | 4.2 (3.7–4.6) | 2.5 (2.8) | ||
| Vista1 | 296 (69) | 4.1 (3.6–4.7) | 5.7 (3.9) | 136 (31) | 16.0 (15.4–16.6) | 27.2 (8.6) | 4.9 (3.9–5.9) | 5.1 (1.6) | |
| Vista2 | 296 (69) | 3.9 (3.4–4.4) | 1.7 (1.2) | 136 (31) | 14.8 (14.3–15.4) | 19.1 (6.0) | 4.2 (3.4–5.1) | 3.7 (1.2) | |
| Vitros | 432 (100) | 5.1 (4.6–5.5) | 8.1 (8.1) | 0 (0) | |||||
| Average |
179 (42) | 3.7 | 6.9 (1.4) | 250 (58) | 12.8 | 23.8 (17.5) | 4.3 | 4.6 (2.5) | |
*Results that showed acceptable comparability to the reference instrument without a converting action. †Results with repeated unacceptable comparability to the reference instrument before conversion, but more acceptable comparability after conversion. ‡The number of times the comparability tests were performed over five years with percentage relative to all available tests in parentheses. §95% confidence intervals were calculated only when the number of cases was more than 50. ||The percentage of unacceptable, incomparable data outside the total allowable limits relative to the number of data points. The percentage relative to total tests (N=432) is shown in parentheses, which can be calculated by multiplying by the percentage of each number of times to total available tests. ¶Statistically significant difference between results before and after the conversion action (
Abbreviations: PBIAS, percent bias; AST, aspartate transaminase; ALT, alanine aminotransferase; ALP, alkaline phosphatase; ALB, albumin; TP, total protein; Na, sodium; K, potassium; Cl, chloride; Ca, calcium; P, phosphate; Chol, cholesterol; Cr, creatinine; PNR, percentage of noncomparable results.
© Ann Lab Med