The QOLIBRI scores are reported on a 0-100 scale , where 0=worst possible quality of life and 100=best possible quality of life.

### Calculating scale scores:-

Responses to the ‘satisfaction’ items (i.e. items on the Cognition, Self, Daily Life & Autonomy, and Social Relationships scales) are coded on a 1 to 5 scale, where 1= “not at all satisfied” and 5=”very satisfied”. Responses to the ‘bothered’ items (i.e. items on the Emotions and Physical Problems scales) are reverse scored to correspond with the satisfaction items, where 1=”very bothered” and 5=”not at all bothered”.

The responses on each scale are summed to give a total, and then divided by the number of responses to give a scale mean. The scale means have a maximum possible range of 1 to 5. The mean can be computed when there are some missing responses, but should not be calculated if more than one third of responses on the scale are missing. In a similar manner the QOLIBRI Total score is calculated by summing all the responses, and then dividing by the actual number of responses. Again, a total score should not be calculated if more than one third of responses are missing.

The scale means are converted to the 0-100 scale by subtracting 1 from the mean and then multiplying by 25. This produces scale scores which have a lowest possible value of 0 (worst possible quality of life) and a maximum value of 100 (best possible quality of life).

### Sample PASW/SPSS syntax.

*** Means for QOLIBRI scales ****.

compute qcog= mean.5 (qa1 to qa7 ).

compute qself = mean.5 (qb1 to qb7 ).

compute qadl = mean.5 (qc1 to qc7 ).

compute qsoc = mean.4 (qd1 to qd6 ).

compute qemo = mean.4 (qe1 to qe5 ).

compute qphys = mean.4 (qf1 to qf5).

Compute qtot = mean.25(qa1 to qf5).

formats qcogn to qtot (f4.2).

exe.

*** Scores for QOL scales ****.

do repeat mean = qcog to qtot /

perc = pqcog pqself pqadl pqsoc pqemo pqphys pqtot.

compute perc = (mean – 1) * 25 .

formats perc (f5.1).

end repeat print.

exe.

var labels pqcog ‘Cognition’ /

pqself ‘Self’ /

pqadl ‘Daily life & autonomy’ /

pqsoc ‘Social Relationships’ /

pqemo ‘Emotions’ /

pqphys ‘Physical Problems’/

pqtot ‘QOLIBRI Total’.

exe.