This is an instrument created by Walker and Greene (1991) which assesses functional disability in children and adolescents, in other words, it examines difficulties in physical and psychosocial functioning resulting from the subject’s state of health. The children or adolescents have to rate the difficulty of performing 13 daily activities on a Likert-type scale from 0 to 5. The FDI has proven to be a valid, reliable tool and has been used on different samples of children and adolescents from 8 to 17 years of age that have different types of pain (recurrent abdominal pain, headaches or minor complaints).

The ALGOS Group has translated and created a Catalan version of the FDI, which has yielded good psychometric properties (Solé et al., 2010).

Claar, R. L., & Walker, L. S. (2006). Functional assessment of pediatric pain patients: Psychometric properties of the functional disability inventory. Pain, 121(1-2), 77-84.

Kashikar-Zuck, S., Flowers, S. R., Claar, R. L., Guite, J. W., Logan, D. E., Lynch-Jordan, A. M., Wilson, A. C. (2011). Clinical utility and validity of the functional disability inventory among a multicenter sample of youth with chronic pain. Pain, 152(7), 1600-1607.

Lynch-Jordan, A. M., Kashikar-Zuck, S., Crosby, L. E., Lopez, W. L., Smolyansky, B. H., Parkins, I. S., et al. (2009). Applying quality improvement methods to implement a measurement system for chronic pain-related disability. Journal of Pediatric Psychology.

Solé E, Huguet A, Miró J. (2010) Functional Disability Inventory: características psicométricas de una versión catalana para niños y adolescentes. VII Congreso de la Asociación Española de Psicopatología y Psicología Clínica. Benicàssim, Spain (poster).

Walker, L. S., & Greene, J. W. (1991). The functional disability inventory: Measuring a neglected dimension of child health status. Journal of Pediatric Psychology, 16(1), 39-58.