. 2025 Nov 12;65:57. doi: 10.1186/s42358-025-00489-w

Table 3.

Reliability of ultrasound grayscale measurements in RA patients

Assessment type	Section	ICC	95%CI	P-value
Intra-observer	Transverse	0.945	0.926–0.960	< 0.001
Intra-observer	longitudinal	0.905	0.872–0.930	< 0.001
Inter-observer	Transverse	0.908	0.877–0.932	< 0.001
Inter-observer	longitudinal	0.861	0.815–0.897	< 0.001

ICC: intraclass correlation coefficient; CI: confidence interval