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Table 4 Exploratory factor analysis (EFA) with four forced factors (n = 322, Imputation 1)

From: The General Health Questionnaire-28 (GHQ-28) as an outcome measurement in a randomized controlled trial in a Norwegian stroke population

  Factor 1
Explaining 27.8%
of the variance
Cronbach’s α: 0.844
Factor 2
Explaining 9.9% of the variance
Cronbach’s α: 0.881
Factor 3
Explaining 8.2% of the variance
Cronbach’s α: 0.838
Factor 4
Explaining 5.7% of the variance
Cronbach’s α: 0.719
 
Pattern Structure Pattern Structure Pattern Structure Pattern Structure a
(A) Somatic symptoms
 1. Been feeling perfectly well and in good health?      −0.742 −0.694    0.457
 2. Been feeling in need of a good tonic?      −0.364 −0.430    0.270
 3. Been feeling run down and out of sorts?      −0.514 −0.569    0.378
 4. Been feeling that you are ill?      −0.491 −0.568    0.432
 5. Been getting any pains in your head?        0.718 0.754 0.535
 6. Been getting a feeling of tightness or pressure in your head?        0.637 0.677 0.518
 7. Been having hot or cold spells?        0.448 0.508 0.320
(B) Anxiety and insomnia
 1. Been losing much sleep over worry? 0.572 0.610        0.414
 2. Been having difficulty in staying asleep once you fall asleep? 0.344 0.433        0.321
 3. Been feeling constantly under strain? 0.585 0.585        0.372
 4. Been getting edgy or bad tempered? 0.485 0.508        0.327
 5. Been getting scared or panicky for no reason? 0.635 0.612        0.444
 6. Been feeling everything is getting on top of you? 0.621 0.659        0.442
 7. Been feeling nervous and strung-out all the time? 0.710 0.713        0.482
(C) Social dysfunction
 1. Been managing to keep yourself busy and occupied?      −0.521 −0.553    0. 381
 2. Been taking longer over the things you do?      −0.670 −0.644    0.427
 3. Been feeling on the whole that you were doing things well?      −0.692 −0.689    0.480
 4. Been satisfied with the way you have carried out your tasks?      −0.688 −0.716    0.499
 5. Been feeling that you are playing a useful part in things?      −0.646 −0.643    0.439
 6. Been feeling capable of making decisions about things?      −0.349 −0.403    0.220
 7. Been able to enjoy your normal day-to-day activities? 0.392 0.442        0.327
(D) Severe depression
 1. Been thinking of yourself as a worthless person? 0.515 0.589        0.469
 2. Been feeling that life is entirely hopeless? 0.580 0.670        0.584
 3. Been feeling that life is not worth living?    −0.591 −0.699      0.560
 4. Been thinking of the possibility that you may do away with yourself?    −0.974 −0.957      0.827
 5. Been feeling at times that you could not do anything because your nerves were too bad? 0.493 0.596        0.480
 6. Been finding yourself wishing you were dead and away from it all?    −0.827 −0.856      0.730
 7. Been finding that the idea of taking your own life keeps coming into your mind?    −0.869 −0.835      0.726
  1. aCommunalities indicate the amount of variance in each variable that is accounted for