Scoring

Psychometric (unweighted) or Utility (weighted)?

As generic instruments, the AQoL questionnaires are applicable to all public health and clinical interventions, and can be used in different ways.

As a 'psychometric' measure: Each instrument can be used to derive a simple psychometric score for health related quality of life (HRQoL) and to provide profile scores on the different dimensions or items of the descriptive systems. The score is derived by adding the unweighted  response  order of each question.

As a 'utility' measure: When utilities are computed, these instruments can provide dimension scores and an overall index of the health state utility which can be used in economic evaluations, and specifically, cost-utility analysis requiring the computation of quality-adjusted life years  (QALYs).  The ‘utilities’ are, in effect, preference weights and final utility scores should reflect peoples’ preferences more accurately than unweighted aggregates.

The following example question about feeling sad demonstrates the two ways of scoring:

Choice Diagram

Please choose the appropriate instrument, statistical package and instructions, then download the algorithms to calculate your scores.

Utility algorithms (weighted)

Right click on the hyperlink, as indicated below, to access the zip files containing the algorithms for instruments as required

AQoL-8D utility algorithms

This zip file contains an instruction page and the SPSS and STATA algorithms for AQoL-8D

AQoL-7D
AQoL-7D utility algorithm using AQoL-7D instrument
AQoL 7D utility predicted from VisQoL data

AQoL-6D utility algorithms  
SPSS-6D or STATA-6D
AQoL-6D (ADOLESCENT) utility scoring SPSS

AQoL-4D utility algorithms
SPSS-4D or STATA-4D

Unweighted algorithms

AQoL-8D
AQoL-8D unweighted scoring - SPSS
AQoL-8D unweighted scoring -  Excel

AQoL-7D
AQoL-7D unweighted scoring -  Excel
VisQoL unweighted scoring -  Excel

AQoL-6D 
AQoL-6D unweighted Algorithm - SPSS
AQoL-6D unweighted scoring -  Excel

AQoL-6D ADOLESCENT unweighted algorithm - Excel

AQoL-4D 
AQoL-4D unweighted scoring - SPSS
AQoL-4D unweighted scoring -  Excel

VISQOL
VisQoL Scoring psychometric and standardised - Excel

NB: Correction to the AQoL-6D algorithms

AQoL-6D for adults versus AQol-6D ADOLESCENT Utility Scores

In the OPIC study adolescent utilities for Australia, New Zealand, Fiji and Tonga were derived by adjusting the AQoL-6D scores for Australian adults. The original 6D utility study estimated 9 separate models.

The aqol.com.au website now recommends the scoring algorithm reproduced from model 6 for adults and the algorithm from model 1 for adolescents. This implies that adolescent scores calculated from model 1 should not, in principle, be compared with adult scores calculated from model 6 (or model 9, the  original  model recommended in Richardson et al 2007).

Model 1 scores may be obtained from the formula:

AQoL-6D (model 1)  = [AQoL-6D (Multiplicative)]0.59

This may be further adjusted to obtain the adolescent scores described in Moodie et al. (2010).