Table 5.

The Passing-Bablok regression equations for the Roche assay and IDS iSYS assay for PINP (references [31,33–36]).

Subjects	Regression equation	Slope 95% CI	Intercept 95% CI
Osteoporosis patients [31]	Cobas = 0.91 iSYS + 2.6	0.90, 0.92	2.2, 3.1
Healthy blood donors [33]	Elecsys = 0.94 iSYS − 3.6	0.80, 1.15	−18.4, 3.6
Healthy subjects, patients with osteoporosis [34]	iSYS = 1.05 Cobas −1.4	1.04, 1.06	−1.9, − 0.8
Healthy volunteers, patients with rheumatoid arthritis [36]	iSYS = 0.98 Elecsys −1.42	0.94, 1.03	− 2.86, 0.08
Haemodialysis patients [33]	Elecsys = 5.74 iSYS − 95.6	4.56, 8.57	− 240.9, −31.9
Patients with CKD [35]	iSYS = 0.74 Cobas + 3.7	0.67, 0.81	1.2, 5.8
Bedridden elderly patients [33]	Elecsys = 1.57 iSYS −12.0	1.43, 1.73	−19.0, − 5.7