Aqol-6D

Quicklinks

References

Construction of Descriptive System

Construction of Utility Weights

Validity, Reliabilty, Transformations

Norms

Conceptualisation

Description

  • 6 separately scored dimensions, with variable item numbers and response levels.
  • A simple global ‘utility’ score
  • Increased sensitivity in the range of good health

Dimensions

  • Independent Living - household tasks, mobility outside the home, walking and self-care;
  • Relationships - friendships, family and community role;
  • Mental Health - feelings of despair, worry, sadness, tranquility/agitation;
  • Coping - covering having enough energy, being in control and coping with problems;
  • Pain - the frequency of pain, the degree of pain and the interference with usual activities caused by pain;
  • Senses - seeing, hearing and communication.

Construction

Descriptive System

  • Structural Equation Modelling of the construction item bank  completed by a representative sample of 316 members of the public across SEIFA groups and
    312 hospital patients.
  • Items were collected as for AQoL-4D.

Scaling System

  • TTO and PTO interviews were done with 361 randomly selected members of the public across SEIFA groups to determine utility weights for items, dimensions and AQoL “all worst”
  • Multiplicative models to combine items into dimensions
  • Multiplicative model to combine dimensions into a ‘stage 1’ single index.
  • Econometric analysis to correct stage 1 estimates to produce a stage 2 index.

Timing

  • AQoL-6D takes about 2-3 minutes to complete.

Research team

  • J Richardson (team leader), N Day, G Hawthorne, S Peacock, A Iezzi