Reliability and validity of the Columbia Impairment Scale (C.I.S.) for adolescents: Survey among an Italian sample in Lazio Region.


  • Alessandra Zanon University of Cassino and Southern Lazio
  • Rosella Tomassoni University of Cassino and Southern Lazio
  • Maria Laura Gargano University of Cassino and Southern Lazio
  • Maria Gabriella Granai University of Cassino and Southern Lazio



Objective: Objective of this pilot study was to evaluate the reliability and internal consistency of the Columbia Impairment Scale questionnaire, as a tool to provide a global measure of impairment functioning in an Italian adolescents sample.

Methods: The questionnaire is composed by 4 sections of functioning (interpersonal relations, broad psychopathological domains, functioning in schoolwork, use of leisure time) for a total of 13 items. It was administered twice in the same sample belonging to a Professional School in Frosinone (Central Italy), to 120 adolescents on the first administration and to 108 on the second time. Reliability analysis was performed and Cronbach’s alpha was used as a measure of internal consistency. Statistical analysis was performed using SPSS 19.0.

Results: Considering all 13 items, Cronbach’s alpha amounted to 0,762 on the first time and to 0.826 on the second time, showing a very satisfactory internal validity. In the sample selected, the answers to the questionnaire showed adolescents have a low impairment functioning.

Conclusion: The results of the pilot study indicate that the questionnaire presents a good reliability property and in terms of internal consistency and validity shows a good performance. The results are promising and suggest that this tool cood be used in the Italian setting for future research targeted to adequately capture the impaired functioning in adolescents.






Original articles