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Table 3 Factor analysis of the PEmb-QoL questionnaire*

From: Quality of life after pulmonary embolism: validation of the French version of the PEmb-QoL questionnaire

   Factor 1 Factor 2 Factor 3
Item    Factor loadings  
1a Pain behind or between the shoulder blades? 0.1031 0.6572 0.0632
1b Pain on or in the chest? 0.0770 0.7807 0.2031
1c Pain in the back? 0.2416 0.6543 0.1467
1d Sensation of pressure? 0.2262 0.6425 0.2495
1e Feeling that there is “still something there”? 0.2990 0.6354 0.2826
1f “Burning sensation” in the lung? 0.09300 0.7339 0.2218
1 g “Nagging feeling”? 0.1382 0.7831 0.2318
1 h Difficulty in breathing or breathlessness? 0.4637 0.5088 0.3665
4b Daily activities at home 0.7796 0.3230 0.2529
4c Social activities 0.7123 0.1880 0.2811
4d Vigorous activities 0.7471 0.2588 0.1131
4e Moderate activities 0.8412 0.1479 0.1001
4f Lifting or carrying activities 0.8319 0.1576 0.1946
4 g Climbing several flights of stairs 0.7851 0.2177 0.2789
4 h Climbing one flight of stair 0.8031 0.0575 0.2114
4i Bending, kneeling, or squatting 0.6167 0.1355 −0.0389
4j Walking more than half a mile 0.8121 0.1190 0.0929
4 k Walking a couple of hundred yards 0.8235 −0.0700 0.0380
4 l Walking about one hundred yards 0.6313 −0.0149 0.0573
4 m Washing or dressing yourself 0.6052 −0.0302 0.1083
5a Cut down the amount of time you spent on work or other activities 0.5441 0.2653 0.3327
5b Accomplished less than you would like 0.5570 0.3432 0.3364
5c Were limited in the kind of work or other activities 0.5898 0.3545 0.3838
5d Had difficulty performing the work or other activities 0.5865 0.3976 0.3608
6 Interference with normal social activities 0.4729 0.5088 0.4595
7 Intensity of pain around shoulder blades or in chest 0.1619 0.7540 0.3329
8 Intensity of breathlessness 0.5201 0.3874 0.5030
9a Worried about having another pulmonary embolism? −0.0201 0.2722 0.7017
9b Felt irritable? 0.2748 0.3324 0.7112
9c Worried if having to stop anticoagulant medication? −0.0401 0.1433 0.5288
9d Became emotional more readily? 0.2299 0.1613 0.8114
9e Bothered becoming emotional more readily? 0.2305 0.2645 0.7739
9f Were depressed or in low spirits? 0.3078 0.4111 0.5902
9 g Felt being a burden to family and friends? 0.5021 0.3905 0.4279
9 h Were afraid to exert yourself? 0.5391 0.4042 0.4742
9i Felt limited in taking a trip? 0.6300 0.3516 0.4126
9j Were afraid of being alone? 0.3926 0.1675 0.6115
  1. *The scree test suggests three latent factors with eigenvalues of 17.0, 3.9, and 1.7, respectively. After rotation, the three factors accounted for 35%, 22%, and 19% of total variance.
  2. Numbers in bold indicate the highest factor loadings (>0.3) for each item.