Table 7.

The ratio of discrimination of answers in the selected items using discriminant analysis

Itemsl	The minimal ratio of discrimination for each choice	The ratio of discrimination through all choices	κ value
C-l	56.0%	76.1%	0.59
C-7	56.5%	82.9%	0.52
C-13	25.0%	80.5%	0.43
C-18	50.0%	79.7%	0.65
C-21	43.1%	70.0%	0.53
C-28	13.8%	76.8%	0.35
C-30	43.4%	54.0%	0.23
C-31	44.0%	76.6%	0.48
C-32	40.4%	76.3%	0.44
C-35	54.2%	77.9%	0.54
C-37	16.7%	77.0%	0.44
C-38	20.0%	80.3%	0.39
C-41	39.1%	63.2%	0.44
QOL-1	25.0%	56.1%	0.31
QOL-3-5	58.1%	81.0%	0.68
QOL-3-6	61.5%	74.0%	0.55
QOL-3-7	35.1%	71.6%	0.56
QOL-4-2	0.0%	49.5%	0.34
QOL-8	25.0%	54.0%	0.40
QOL-9-6	31.6%	61.3%	0.45
QOL-9-7	25.9%	55.4%	0.40
QOL-9-8	16.7%	51.9%	0.36
QOL-11-2	18.2%	41.6%	0.22
QOL-11-3	0.0%	53.7%	0.17