Table 2.

FACT-M item scale scores, fit statistics, and model selection

			Training dataset							Validation dataset
			Rasch scale		Infit		Outfit			Rasch scale		Infit		Outfit
Item	Domain	Final model	Score	SE	MNSQ	ZSTD	MNSQ	ZSTD	r	Score	SE	MNSQ	ZSTD	MNSQ	ZSTD	r
Melanoma Subscale
1	Physical	Maintained	−0.01	0.10	1.58	3.70	1.58	2.80	0.82	−0.06	0.10	0.81	−1.60	0.78	−1.50	0.90
2	Physical	Maintained	−0.19	0.10	1.31	1.70	1.47	1.60	0.84	−0.31	0.10	1.50	2.90	1.87	3.10	0.85
3	Physical	Maintained	0.32	0.12	1.12	0.80	1.61	2.10	0.82	0.67	0.12	1.55	3.30	1.99	3.60	0.81
4	Physical	Maintained	0.01	0.10	1.02	0.20	0.92	−0.20	0.86	0.05	0.12	0.78	−1.00	0.94	−0.10	0.88
5	Physical	Maintained	−0.36	0.09	0.92	−0.60	0.84	−1.10	0.87	−0.28	0.10	1.01	0.10	0.94	−0.30	0.88
6	Physical	Maintained	0.15	0.10	1.20	1.20	1.16	0.70	0.85	0.09	0.11	1.06	0.50	1.09	0.50	0.88
7	Physical	Dropped	-	-	-	-	-	-	-	-	-	-	-	-	-	-
8	Physical	Maintained	−0.12	0.10	0.70	−1.50	0.71	−0.60	0.86	−0.06	0.12	0.55	−2.30	0.56	−1.30	0.88
9	Physical	Dropped	−1.62	0.09	2.41	7.60	9.90	9.90	−0.04	−1.65	0.09	2.58	8.00	9.90	9.90	−0.10
10	Physical	Dropped	−0.24	0.09	1.47	3.30	1.55	2.90	0.80	0.06	0.08	0.82	−1.50	0.90	−0.60	0.84
11	Physical	Dropped	-	-	-	-	-	-	-	-	-	-	-	-	-	-
12	Social	Maintained	−0.10	0.10	0.96	−0.20	0.81	−0.90	0.87	−0.16	0.10	0.85	−0.90	0.69	−1.20	0.89
13	Emotional	Maintained	0.03	0.10	0.83	−1.30	0.84	−1.00	0.88	0.05	0.10	0.90	−0.90	0.95	−0.30	0.89
14	Emotional	Maintained	0.33	0.11	0.32	−4.30	0.40	−2.10	0.88	0.12	0.12	0.83	−0.80	0.61	−1.00	0.88
15	Emotional	Maintained	−0.06	0.10	0.81	−1.40	0.82	−1.10	0.88	−0.11	0.10	0.92	−0.60	0.98	−0.10	0.89
16	Physical	Dropped	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Melanoma Surgical Subscale
17	Physical	Maintained	0.09	0.11	0.70	−1.90	0.56	−1.40	0.91	0.22	0.10	0.89	−0.70	0.94	−0.10	0.88
18	Physical	Maintained	−0.06	0.12	0.77	−1.60	0.76	−1.40	0.93	−0.14	0.10	0.80	−1.50	0.78	−1.20	0.90
19	Physical	Maintained	0.04	0.11	0.47	−4.00	0.35	−3.40	0.93	0.00	0.10	0.51	−4.10	0.37	−3.50	0.91
20	Physical	Maintained	0.23	0.12	0.61	−2.40	0.47	−2.00	0.91	0.18	0.10	0.43	−4.90	0.30	−3.80	0.91
21	Physical	Maintained	0.22	0.12	0.41	−3.80	0.23	−3.00	0.92	0.17	0.10	0.41	−4.90	0.35	−2.80	0.90
22	Physical	Maintained	−0.09	0.11	0.75	−1.50	0.40	−1.70	0.90	0.11	0.10	0.55	−3.50	0.37	−2.70	0.90
23	Physical	Maintained	−0.43	0.12	2.72	9.00	2.66	8.70	0.84	−0.54	0.11	2.81	9.90	2.80	9.90	0.77
24	Physical	Dropped	−0.81	0.06	2.96	9.90	9.90	9.90	−0.05	−0.67	0.06	3.25	9.90	9.90	9.90	−0.16

Abbreviations: SE, standard error; MNSQ, mean square value of the fit statistic; ZSTD, standardized fit statistic; r, Pearson’s correlation coefficient between item score and the total score