Adaptation and validation of the Chinese version of the lung cancer screening health belief scales

BMC Public Health

Table 5 The Rasch analysis of the LCSHB-C

Subscale	Item	Item difficulty ^a	Infit MNSQ	Outfit MNSQ	DIF contrast by gender^b
Perceived barriers to lung cancer screening	B1	0.10	1.26	1.43	0.82
	B2	0.00	0.90	0.90	1.72
	B3	0.02	0.97	1.04	1.71
	B4	-0.17	1.17	1.25	1.35
	B5	-0.01	0.95	0.94	0.06
	B6	-0.03	1.03	1.04	0.55
	B7	-0.02	1.00	1.01	0.28
	B8	-0.01	0.94	1.00	0.01
	B9	-0.01	0.91	0.92	0.89
	B10	-0.06	0.93	0.96	1.69
	B11	-0.14	0.85	0.87	0.03
	B12	0.01	1.17	1.33	2.15
	B13	0.07	0.88	0.87	0.42
	B14	0.04	0.93	0.92	0.04
	B15	0.01	0.81	0.81	2.1
	B16	0.01	1.02	1.06	1.19
	B17	0.21	1.26	1.40	1.77
Perceived benefits of lung cancer screening	Be1	-0.17	1.12	1.04	0.57
	Be2	0.02	0.94	0.88	0.52
	Be3	0.16	1.14	1.11	2.38
	Be4	0.04	0.92	0.83	0.39
	Be5	-0.08	0.93	0.83	0.18
	Be6	0.03	0.92	0.83	0.01
Perceived risk of lung cancer screening	R1	-0.68	1.38	1.38	0.30
	R2	0.14	0.66	0.63	0.42
	R3	0.54	0.91	0.89	0.01
Self-efficacy for lung cancer screening	S1	0.32	1.21	1.26	1.66
	S2	0.10	0.89	0.89	0.00
	S3	-0.11	1.10	1.12	0.15
	S4	-0.14	0.90	0.88	0.59
	S5	-0.12	0.92	0.90	0.75
	S6	0.05	0.87	0.86	1.87
	S7	-0.11	0.96	0.93	0.40
	S8	-0.03	1.06	1.02	0.41
	S9	0.05	1.06	1.04	0.37

MNSQ mean square
^aMeasured in logit; positive item logit indicates that the item requires a lower visual ability than the mean of the items and is an easier item; a negative item logit indicates that the item requires a higher visual ability than the mean of the items and is a more difficult item
^bmale compared with female

ISSN: 1471-2458