Development and validation of a patient-reported outcome measure for stroke patients

Luo, Yanhong; Yang, Jie; Zhang, Yanbo

doi:10.1186/s12955-015-0246-0

Health and Quality of Life Outcomes

Table 5 Results of the second item-selection phase using CTT and IRT

From: Development and validation of a patient-reported outcome measure for stroke patients

Item	SD	Factor loading	Correlation coefficient	CITC	CAID	IRT					Outcome
Item	SD	Factor loading	Correlation coefficient	CITC	CAID	α	b ₁	b ₂	b ₃	b ₄	Outcome
PHD1	1.526	0.745	0.685	0.527	0.777	0.54	−2.65	−1.22	−0.31	1.40	√
PHD2	1.467	0.805	0.638	0.473	0.786	0.68	−2.59	−1.11	−0.36	1.06	√
PHD3	1.543	0.643	0.658	0.488	0.785	0.88	−0.94	−0.06	0.71	1.80	√
PHD4	1.350	0.659	0.687	0.551	0.771	1.14	−2.08	−1.18	−0.62	0.22	√
PHD5	1.230	0.828	0.726	0.616	0.762	1.30	−2.33	−1.37	−0.73	−0.19	√
PHD6	1.218	0.818	0.671	0.547	0.773	1.00	−2.79	−1.61	−0.72	0.58	√
PHD7	1.293	0.628	0.686	0.557	0.771	1.02	−2.51	−1.45	−0.46	0.44	√
PHD8	1.282	0.784	0.805	0.637	0.710	1.14	−2.23	−1.17	−0.31	0.77	√
PHD9	1.314	0.737	0.812	0.642	0.706	1.27	−1.84	−0.87	−0.12	0.92	√
PHD10	1.230	0.666	0.777	0.602	0.728	1.58	−1.94	−1.06	−0.45	0.33	√
PHD11	1.491	0.560	0.733	0.470	0.677	1.38	−1.33	−0.65	−0.23	0.47	√
PHD12	1.349	0.673	0.759	0.546	0.627	1.53	−1.61	−0.91	−0.33	0.33	√
PHD13	1.390	0.515	0.732	0.497	0.783	1.05	−1.84	−0.68	0.00	1.25	√
PHD14	1.305	0.807	0.711	0.481	0.666	0.77	−3.04	−1.74	−0.80	0.83	√
PHD15	1.329	0.772	0.739	0.519	0.643	0.93	−2.19	−1.68	−0.98	0.43	√
PHD16	1.553	0.766	0.833	0.744	0.931	1.23	−1.12	−0.63	−0.19	0.66	√
PHD17	1.546	0.865	0.893	0.833	0.915	1.11	−1.17	−0.64	−0.03	0.87	√
PHD18	1.679	0.836	0.873	0.794	0.922	1.29	−0.46	0.04	0.40	1.03	√
PHD19	1.663	0.888	0.913	0.857	0.910	1.27	−0.59	−0.13	0.23	0.97	√
PHD20	1.606	0.896	0.925	0.879	0.906	1.35	−0.77	−0.26	0.13	0.93	√
PSD1	1.461	0.719	0.763	0.597	0.809	0.88	−1.53	−0.37	0.20	1.86	√
PSD2	1.303	0.714	0.754	0.606	0.805	1.12	−2.21	−0.67	−0.03	1.36	√
PSD3	1.271	0.763	0.780	0.649	0.793	1.38	−1.93	−0.85	−0.26	0.99	√
PSD4	1.338	0.703	0.768	0.622	0.800	1.25	−1.54	−0.37	0.21	1.74	√
PSD5	1.296	0.756	0.806	0.684	0.783	1.50	−1.67	−0.59	−0.01	1.18	√
PSD6	1.232	0.635	0.709	0.546	0.849	1.78	−1.74	−0.84	−0.28	0.72	√
PSD7	1.225	0.507	0.786	0.656	0.821	1.65	−1.83	−0.91	−0.34	0.79	√
PSD8	1.260	0.669	0.843	0.738	0.799	1.88	−1.62	−0.81	−0.24	0.74	√
PSD9	1.302	0.742	0.806	0.676	0.816	1.93	−1.53	−0.53	−0.19	0.78	√
PSD10	1.236	0.767	0.811	0.693	0.811	2.18	−1.66	−0.75	−0.37	0.48	√
PSD11	1.229	0.556	0.808	0.649	0.730	2.07	−1.72	−0.81	−0.27	0.59	√
PSD12	1.264	0.626	0.847	0.709	0.698	2.12	−1.55	−0.73	−0.20	0.62	√
PSD13	1.352	0.647	0.758	0.544	0.783	1.28	−1.93	−0.88	−0.26	0.64	√
PSD14	1.256	0.430	0.748	0.550	0.777	1.76	−1.62	−0.87	−0.39	0.71	√
SOD1	1.486	0.797	0.885	0.745	0.914	1.28	−1.41	−0.19	−0.26	1.05	√
SOD2	1.464	0.878	0.943	0.868	0.811	1.55	−1.20	−0.25	0.25	0.96	√
SOD3	1.511	0.825	0.920	0.814	0.857	1.63	−1.13	−0.20	0.19	0.76	√
SOD4	1.560	0.744	0.848	0.688	0.784	0.22	−5.34	−3.21	−2.21	2.39	√
SOD5	1.233	0.833	0.813	0.680	0.788	0.39	−6.31	−3.12	−2.02	1.70	√
SOD6	1.510	0.790	0.852	0.704	0.774	0.28	−4.74	−2.26	−1.35	2.60	√
SOD7	1.189	0.766	0.766	0.616	0.814	0.44	−5.74	−3.72	−2.61	1.12	√
THD1	1.026	0.817	0.820	0.736	0.825	0.54	−6.29	−4.54	−1.95	0.33	√
THD 2	1.140	0.743	0.798	0.692	0.831	0.47	−6.03	−3.89	−2.11	0.73	√
THD 3	1.252	0.666	0.711	0.549	0.861	0.33	−6.00	−2.44	1.08	4.05	X
THD 4	1.080	0.750	0.736	0.614	0.845	0.50	−6.89	−4.28	−1.91	0.59	√
THD 5	1.022	0.773	0.775	0.674	0.835	0.54	−6.19	−4.46	−2.26	0.28	√
THD 6	1.151	0.783	0.796	0.687	0.831	0.59	−5.00	−3.19	−1.31	0.79	√

Note: CTT, classical test theory; IRT, item response theory; SD, Standard Deviation; CITC, corrected item-total correlation; CAID, Cronbach’s α if item deleted ;"√" decision to retain the selected item, "X" to delete the item; boldface indicates values that did not meet standard.

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ISSN: 1477-7525

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