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Linearity of the Freelite™ FLC Assay on the SPAPLUS™ Using Multiple Dilutions of Patient Serum Pools
| Measuring interval | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| claimed by manufacturer | Allowable nonlinearity | Tested range | Linear fit | ||||||
| Lower | Upper | Lower goal for | Upper goal for | ||||||
| Analyte (mg/l) | limit | limit | levels 1 and 2 | levels 3–5 | Slope | y Intercept | SE of fit | ||
| κFLC | 4.0 | 180.0 | <9.7 mg/l | >9.7 mg/l | 9.68 | 152.25 | 1.020 | 1.000 | 3.512 |
| 3.60 mg/l | 7.95% | ||||||||
| λFLC | 4.5 | 165.0 | <5 mg/l | >5 mg/l | 4.96 | 171.09 | 0.996 | −5.120 | 5.833 |
| 5.30 mg/l | 11.4% | ||||||||
