Table 2.

Correlation between QGIT and the TST in dialysis patients

TST Cutoff (mm)	Overall Agreement (%)	κ	95% CI
One-step TST
5	57.5	0.17	−0.04 to 0.38
10	67.5	0.28	0.06 to 0.50
15	62.5	0.08	−0.07 to 0.23
18	60.0	−0.02	−0.09 to 0.04
Two-step TST
5	58.9	0.24	0.05 to 0.42
10	57.8	0.16	−0.07 to 0.39
15	65.6	0.23	0.03 to 0.44
18	63.8	0.12	−0.04 to 0.27

Excluded from analysis are those with indeterminate responses (n = 10) and those without TST results (n = 3).