TABLE 3

Precision of ¹⁸F-Fluoride PET and Biochemical Markers

Parameter	Root mean square SD	CV (%)	Intraclass correlation (%)
K_i-4k (mL·min⁻¹·mL⁻¹)	0.007	26.6 (19.7–41.2)	0.44 (−0.04–0.76)^†
K_i-3k (mL·min⁻¹·mL⁻¹)	0.002	12.2 (8.9–18.6)^*	0.85 (0.5–0.9)^‡
K_i-PAT (mL·min⁻¹·mL⁻¹)	0.003	13.8 (10.3–21.5)^*	0.70 (0.33–0.88)^‡
SUV_mean	0.775	14.4 (10.6–22.3)	0.36 (−0.16–0.72)
Bone-specific ALP (U/I)	1.81	9.9 (7.3–15.4)	0.87 (0.67–0.95)^‡
Deoxypyridinoline (nmol/mm)	0.87	13.9 (10.3–21.5)	0.76 (0.44–0.91)^‡
Osteocalcin (ng/mL)	1.90	17.8 (13.1–27.5)	0.60 (0.19–0.84)^†

↵* P < 0.05 vs. K_i-4k.
↵† P < 0.05.
↵‡ P < 0.001.
Data in parentheses are 95% confidence intervals, estimated from χ² distribution.