From: Differential item functioning (DIF) of SF-12 and Q-LES-Q-SF items among french substance users
Variable-related DIF | ∆ Score SF-12a | P value |
---|---|---|
Mean (SD) | ||
Sex (item MH1) | 0.98 | |
Male (n =103) | 0.05 (3.0) | |
Female (n=21) | 0.03 (3.1) | |
Age (item MH2) | 0.73 | |
Age < 36 years (n =72) | -0.64 (2.9) | |
Age ≥ 36 years (n=52) | -0.45 (3.1 | |
Age (item MH4) | 0.93 | |
Age < 36 years (n =72) | 0.96 (9.4) | |
Age ≥ 36 years (n=52) | 1.12 (9.9) |