Unidimensional scales for fears of cancer recurrence and their psychometric properties: the FCR4 and FCR7

Table 7 IRT (2 parameter model) Summary results showing discriminability (‘discrim’) and difficulty (‘diff’, i.e. location or severity) coefficients

	Coeff.	SE	z	P
fcr1
Discrim	3.99	.451	8.86	0.000
Diff
>=2	−1.03	.108	−9.53	0.000
>=3	.05	.080	0.65	0.517
>=4	1.27	.116	10.93	0.000
=5	1.90	.154	12.38	0.000
fcr2
Discrim	5.23	.667	7.84	0.000
Diff
>=2	−.72	.091	−7.95	0.000
>=3	.39	.080	4.92	0.000
>=4	1.17	.108	10.82	0.000
=5	2.21	.180	12.26	0.000
fcr3
Discrim	5.12	.689	7.43	0.000
Diff
>=2	−1.30	.119	−10.93	0.000
>=3	−.26	.080	−3.27	0.001
>=4	1.03	.102	10.08	0.000
=5	2.07	.164	12.62	0.000
fcr4
Discrim	4.18	.515	8.12	0.000
Diff
>=2	−.03	.080	−0.41	0.682
>=3	.52	.086	6.09	0.000
>=4	1.45	.126	11.52	0.000
=5	2.28	.197	11.58	0.000
fcr5
Discrim	2.47	.283	8.74	0.000
Diff
>=2	−.27	.095	−2.87	0.004
>=3	.61	.103	5.95	0.000
>=4	2.32	.224	10.34	0.000
=5	3.36	.500	6.73	0.000
fcr6
Discrim	.927	.141	6.56	0.000
Diff
>=2	−1.85	.306	−6.05	0.000
>=3	−.51	.171	−2.99	0.003
>=4	1.65	.277	5.98	0.000
=5	3.47	.544	6.38	0.000
fcr7
Discrim	2.70	.262	10.30	0.000
Diff
>= 1	−.94	.114	−8.30	0.000
>= 2	−.22	.089	−2.51	0.012
>= 3	.20	.088	2.28	0.023
>= 4	.68	.100	6.82	0.000
>= 5	.99	.113	8.75	0.000
>= 6	1.26	.128	9.87	0.000
>= 7	1.58	.147	10.73	0.000
>= 8	1.73	.156	11.07	0.000
>= 9	2.39	.220	10.89	0.000
=10	2.68	.268	9.98	0.000

ISSN: 1477-7525