Yale Food Addiction Scale 2.0 (YFAS 2.0) and modified YFAS 2.0 (mYFAS 2.0): Rasch analysis and differential item functioning

Saffari, Mohsen; Fan, Chia-Wei; Chang, Yen-Ling; Huang, Po-Ching; Tung, Serene En Hui; Poon, Wai Chuen; Lin, Chien-Ching; Yang, Wen-Chi; Lin, Chung-Ying; Potenza, Marc N.

doi:10.1186/s40337-022-00708-5

Journal of Eating Disorders

Table 7 DIF for the 11 mYFAS2 diagnostic criteria

From: Yale Food Addiction Scale 2.0 (YFAS 2.0) and modified YFAS 2.0 (mYFAS 2.0): Rasch analysis and differential item functioning

Diagnostic criteria	t value	P value	DIF contrast*
Gender DIF
Substance taken in larger amount and for longer period than intended	− 0.37	0.71	− 0.11
Persistent desire or repeated unsuccessful attempts to quit	− 2.18	0.03	− 0.69
Much time/activity to obtain, use, recover	− 0.06	0.95	− 0.02
Important social, occupational, or recreational activities given up or reduced	3.77	< 0.01	0.94
Use continues despite knowledge of adverse consequences (e.g., emotional problems, physical problems)	− 0.89	0.38	− 0.25
Tolerance (marked increase in amount; marked decrease in effect)	0.17	0.87	0.06
Characteristic withdrawal symptoms; substance taken to relieve withdrawal	− 2.69	0.01	− 0.73
Continued use despite social or interpersonal problems	− 1.06	0.29	− 0.26
Failure to fulfill major role obligation (e.g., work, school, home)	3.41	< 0.01	0.83
Use in physically hazardous situations	− 0.26	0.79	− 0.06
Craving, or a strong desire or urge to use	− 0.87	0.39	− 0.26
BMI DIF
Substance taken in larger amount and for longer period than intended	0.40	0.69	0.13
Persistent desire or repeated unsuccessful attempts to quit	0.91	0.36	0.31
Much time/activity to obtain, use, recover	− 1.76	0.07	− 0.66
Important social, occupational, or recreational activities given up or reduced	− 1.41	0.16	− 0.37
Use continues despite knowledge of adverse consequences (e.g., emotional problems, physical problems)	0.62	0.53	0.19
Tolerance (marked increase in amount; marked decrease in effect)	− 1.51	0.13	− 0.55
Characteristic withdrawal symptoms; substance taken to relieve withdrawal	0.15	0.88	0.04
Continued use despite social or interpersonal problems	− 0.38	0.70	− 0.10
Failure to fulfill major role obligation (e.g., work, school, home)	0.08	0.93	0.02
Use in physically hazardous situations	1.61	0.11	0.42
Craving, or a strong desire or urge to use	0.71	0.48	0.23

DIF differential item functioning
No substantial DIF was found in mYFAS 2.0
*Positive values indicate that the probability of the item endorsement is easier for male participants than female participants; easier for participants with BMI < 24 than those with BMI ≥ 24

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ISSN: 2050-2974

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