To construct and test the validity of a new psychometric questionnaire to assess psychological impact of facial lipoatrophy (ABCD-F), that is the most stigmatizing feature of HIV-related lipodystrophy.

• Construction: The development went through Focus groups and Content Validity, Item reduction and Exploratory Factor Analysis.

• Validation: ABCD-F questionnaire was administered together with ABCD and MOS HIV questionnaires. The Cronbach's Alfa was used to test internal consistency, while convergent validity and divergent validity were analyzed by the correlations with MOS, ABCD items and BMI and CD4 counts respectively.

42 HIV+ people participated to focus groups. In the EFA the 17 Items were aggregated around psychological distress and role functioning domains.

ABCD-F showed high internal consistency (Chronbach's alpha = 0.95). Both convergent and divergent validity were confirmed. ABCD-F scores were highly correlated to Physical Health Summary (B 0.59; 95% [CI] 0.35; 0.84; p< 0.0001), Mental Health Summary (B-1.54; 95% [CI] 1.15; 1.93; p< 0.0001), and weakly correlated to CD4 count (B-0.02; 95% [CI] -0.01; 0.06; p=0.54) and HIV viral load (B-0.004; 95% [CI] -2.69; 2.69; p=1.00).

ABCD-F is a valid and reliable questionnaire to assess psychological impact of facial lipoatrophy (FLA).

ABCD-F may result as a useful tool both in clinical and research settings: it's able to identify people experiencing greater psychological impact due to FLA. It may become an objective instrument to evaluate priority and efficacy of plastic surgery to treat lipodystrophy. In research setting may be used to compare different populations or different treatments of FLA.