Skip to main content

Table 4 Unforced principal components analysis with varimax rotation after removal of items and forced one-factor analysis with N/A items scored as zero (items loading at > 0.4 in bold).

From: +Psychometric evaluation of the MacDQoL individualised measure of the impact of macular degeneration on quality of life

Item Rotated Component Matrix
Four factor solution
(variance explained = 64.3%)
Single factor solution
(variance explained = 49%)
  Factor 1 Factor 2 Factor 3 Factor 4 Factor 1
household tasks 0.734  0.098 0.136 0.312 0.6869
personal affairs 0.754  0.254 0.146 0.099 0.7264
shopping 0.747  0.042 0.317 0.219 0.7145
personal relationship 0.210 -0.062 0.132 0.778 0.4219
family 0.179  0.411 0.199 0.629 0.6127
friends and social 0.252  0.604 0.095 0.541 0.6961
appearance 0.342  0.210 0.443 0.181 0.5821
do physically 0.587  0.473 0.269 0.023 0.7659
get out and about 0.699  0.324 0.252 0.125 0.7809
holidays 0.199  0.793 0.188 0.050 0.6582
hobbies/leisure 0.589  0.549 0.081 0.091 0.7484
self-confidence 0.495  0.282 0.259 0.266 0.6691
motivation 0.387  0.444 0.310 0.291 0.7150
peoples reaction 0.265  0.259 0.702 -0.071 0.5935
future 0.189  0.284 0.533 0.162 0.5541
finances 0.048 -0.070 0.747 0.148 0.3558
independence 0.716  0.444 0.173 0.158 0.8345
do for others 0.679  0.322 0.227 0.099 0.7491
mishaps 0.387  0.651 0.419 0.176 0.7906
enjoy meals 0.375  0.349 0.538 0.160 0.7141
time taken 0.321  0.460 0.466 0.204 0.7208
nature 0.305  0.752 0.150 0.127 0.7122