Table 3. The Cohen’s weighted kappa of each cutoff values.

Both sides cutoff values (value range, %)		Cohen’s weighted kappa
		Patient’s perception	Clinician subjective interpretation
± 2.5	(47.5–52.5%)	–0.011	0.298
± 5.0	(45.0–55.0%)	–0.007	0.302
± 7.5	(42.5–57.5%)	0.036	0.233
± 10.0	(40.0–60.0%)	0.017	0.096