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. Author manuscript; available in PMC: 2021 Jun 28.
Published in final edited form as: Clin Chim Acta. 2020 Dec 28;515:16–20. doi: 10.1016/j.cca.2020.12.023

Table 2.

Performance specifications of the four commercially available assays for serum N-terminal propeptide of type I collagen (PINP) [15,2022].

PINP assay Measuring range Lower limit of detection Intra-assay CV Inter-assay CV
Orion Diagnostica, Finland 5–250 μg/L 2.3 μg/L 2.3–3.5% 2.7–6.1%
iSYS (IDS), UK 2–230 μg/L 2.0 μg/L 2.6–3.0% 4.2–5.3%
Roche Diagnostics, Germany 5–1200 μg/L 5.0 μg/L 1.4–2.3% 2.1–4.5%.
Uscn, Life Science, China 0.78–6.2 μg/L 0.041 μg/L 2.9–4.9% 4.6–5.3%