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Table 3 Results of the WHOQOL-AGE scale analysis based on the graded response model for each factor (n = 2994)

From: Validation of an instrument to evaluate quality of life in the aging population: WHOQOL-AGE

Items Factor 1 Factor 2
Discrimination parameter Total information explained (%) Discrimination parameter Total information explained (%)
Q1 1.544 7.95 1.398 9.71
Q2 1.977 9.66 - -
Q3 2.704 14.51 - -
Q4 3.311 19.11 - -
Q5 3.153 16.91 - -
Q6 2.635 14.24 - -
Q7 1.392 6.47 - -
Q8 2.136 11.15 - -
Q9 - - 3.190 23.85
Q10 - - 3.392 26.09
Q11 - - 3.213 24.41
Q12 - - 1.369 7.71
Q13 - - 1.377 8.22