GC-PROM: validation of a patient-reported outcomes measure for Chinese patients with gastric cancer

Hu, Xiaojuan; Zhao, Fen; Yu, Hongmei; Luo, Yanhong; Liu, Jinchun; Zhang, Yanbo

doi:10.1186/s12885-020-6518-z

BMC Cancer

Table 2 Screening results of the second item-selection phase using CTT and IRT

From: GC-PROM: validation of a patient-reported outcomes measure for Chinese patients with gastric cancer

Item	IRT					SD	Factor analysis	CITC	Retest reliability	Correlation coefficient	P	Outcome
Item	α	b₁	b₂	b₃	b₄	SD	Factor analysis	CITC	Retest reliability	Correlation coefficient	P	Outcome
PHD1	3.23	−1.67	−0.59	0.24	1.25	1.141	0.342	0.587	0.923	0.702	0.001	√
PHD2	3.51	−1.78	−0.70	0.07	0.98	1.179	0.351	0.601	0.887	0.716	0.001	√
PHD3	0.80	−3.63	−1.48	0.71	3.08	1.060	0.749	0.454	0.882	0.585	0.001	×
PHD4	0.96	−3.94	−2.47	−0.78	1.14	1.063	0.082	0.463	0.915	0.593	0.001	×
PHD5	1.33	−3.53	−2.92	−1.71	−0.19	0.923	0.191	0.525	0.791	0.629	0.001	×
PHD6	1.13	−2.99	−1.25	0.02	2.21	1.066	0.684	0.577	0.839	0.687	0.001	√
PHD7	0.83	−2.81	−1.32	0.33	2.67	1.181	0.610	0.489	0.927	0.628	0.001	√
PHD8	1.19	−3.62	−2.49	−1.06	0.77	1.001	0.571	0.588	0.882	0.690	0.001	√
PHD9	0.42	−7.06	−4.04	− 0.50	3.28	1.093	0.443	0.325	0.928	0.479	0.001	×
PHD10	3.25	−3.10	−2.39	−1.35	−0.09	0.758	0.714	0.599	0.818	0.817	0.001	√
PHD11	2.00	−2.72	−2.01	−1.15	0.39	0.937	0.571	0.500	0.795	0.814	0.001	√
PHD12	1.29	−4.66	−3.32	−1.85	−0.05	0.798	0.467	0.419	0.805	0.725	0.001	×
PHD13	1.26	−2.28	−1.06	0.57	2.09	1.103	0.511	0.496	0.727	0.769	0.001	√
PHD14	9.30	−1.60	−0.60	0.38	1.39	1.019	0.437	0.772	0.846	0.901	0.001	√
PHD15	3.46	−1.69	−0.81	0.10	1.22	1.102	0.330	0.700	0.826	0.876	0.001	√
PHD16	5.25	−0.92	−0.14	0.79	1.73	1.129	0.814	0.799	0.905	0.946	0.001	√
PHD17	4.32	−1.58	−0.50	0.31	1.11	1.176	0.780	0.799	0.955	0.951	0.001	√
PSD1	3.32	−1.49	−0.37	0.53	1.48	1.124	0.830	0.691	0.809	0.875	0.001	√
PSD2	3.77	−1.02	−0.11	0.78	1.49	1.195	0.869	0.713	0.844	0.894	0.003	√
PSD3	1.18	−4.14	−1.94	−0.44	1.66	0.946	0.456	0.465	0.866	0.715	0.001	×
PSD4	2.41	−2.48	−1.49	−0.32	0.64	1.031	0.788	0.683	0.866	0.805	0.001	√
PSD5	3.33	−1.87	−1.04	−0.11	0.85	1.091	0.799	0.757	0.914	0.858	0.002	√
PSD6	3.41	−1.79	− 1.07	−0.19	0.86	1.101	0.757	0.744	0.921	0.851	0.001	√
PSD7	2.88	−2.68	−1.47	−0.57	0.81	0.917	0.754	0.718	0.865	0.817	0.005	×
PSD8	1.21	−3.09	−1.68	−0.14	1.81	1.022	0.544	0.485	0.886	0.663	0.001	√
PSD9	2.90	−2.30	− 1.33	−0.38	0.50	1.085	0.832	0.755	0.834	0.887	0.001	√
PSD10	3.52	−1.84	−0.86	0.01	0.93	1.149	0.849	0.781	0.822	0.906	0.001	√
PSD11	5.12	−1.80	−1.01	−0.30	0.59	1.145	0.835	0.814	0.743	0.921	0.001	√
SOD1	4.27	−5.58	−1.78	−1.13	−0.05	0.827	0.883	0.740	0.860	0.868	0.006	√
SOD2	5.00	−2.14	−1.24	−0.62	0.34	1.044	0.908	0.761	0.905	0.905	0.001	√
SOD3	1.86	−2.02	−0.99	0.30	1.50	1.079	0.813	0.622	0.835	0.844	0.001	√
SOD4	1.01	−4.17	−2.97	−1.86	0.18	0.948	0.522	0.399	0.881	0.575	0.001	×
SOD5	1.41	−2.30	−0.97	0.39	1.80	1.117	0.717	0.569	0.838	0.730	0.001	√
SOD6	6.85	−1.53	−0.68	0.14	1.13	1.126	0.926	0.842	0.737	0.909	0.001	√
SOD7	5.99	−1.66	−0.72	0.21	1.07	1.111	0.918	0.834	0.711	0.904	0.001	√
SOD8	2.52	−1.59	−0.89	0.08	1.15	1.176	0.813	0.662	0.764	0.801	0.001	√
THD1	3.63	−1.99	−1.19	0.00	1.11	0.983	0.868	0.780	0.804	0.898	0.001	√
THD2	7.16	−1.76	−0.78	0.24	1.12	1.031	0.863	0.829	0.776	0.926	0.001	√
THD3	2.78	−2.06	−0.93	0.12	1.00	1.098	0.780	0.746	0.696	0.893	0.001	√
THD4	2.04	−3.18	− 2.14	−0.22	1.20	0.854	0.657	0.544	0.880	0.885	0.001	√
THD5	2.85	−2.81	−1.62	0.21	1.50	0.812	0.601	0.544	0.736	0.872	0.001	√
THD6	3.61	−2.65	−1.64	−0.79	0.48	0.888	0.868	0.780	0.811	0.908	0.001	√
THD7	13.24	−4.71	−2.08	−0.76	0.24	0.782	0.936	0.893	0.826	0.951	0.001	√
THD8	5.49	−4.47	−1.89	−0.71	0.35	0.826	0.898	0.833	0.901	0.926	0.006	√
THD9	2.76	−2.14	−1.32	0.21	1.29	0.967	0.860	0.574	0.850	0.880	0.001	√
THD10	2.19	−1.81	−0.82	0.51	1.96	1.027	0.860	0.574	0.918	0.894	0.001	√

“√"was represented the selected item. “×” represented the item considered to be deleted. Bold word indicated values did not meet the criteria
PHD physiological domain, PSD psychological domain, SOD social domains, THD therapeutic domain, IRT item response theory, SD standard deviation, CITC corrected item-total correlation

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