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Table 4 Factor loadings of the K-BDRS.

From: Clinical assessment of bipolar depression: validity, factor structure and psychometric properties of the Korean version of the Bipolar Depression Rating Scale (BDRS)

  Factor
1 2 3
13. Suicidal ideation .794 −.077 .064
14. Guilt .726 −.097 .015
11. Worthlessness .628 .156 −.053
12. Helplessness .603 .324 −.032
8. Anxiety .578 .128 .213
1. Depression .553 .287 .060
17. Lability .500 −.357 .392
2. Sleep disturbance .393 −.074 −.002
10. Flattened affect −.289 .952 .235
6. Reduced motivation .250 .621 −.194
5. Activity/energy reduction .296 .619 −.140
9. Anhedonia .272 .593 −.026
4. Social impairment .302 .410 −.135
7. Reduced concentration .266 .405 −.014
3. Appetite disturbance .191 .213 .196
18. Increased motor drive −.192 .049 .840
19. Increased speech −.040 −.086 .797
20. Agitation .196 .287 .574
15. Psychotic symptoms −.015 .412 .560
16. Irritability .380 −.322 .395
  1. Extraction method: unweighted least squares
  2. Rotated method: Promax with Kaiser normalization
  3. Loadings in bold represent the highest loading of each item onto one of the three factors
  4. K-BDRS Korean version of the Bipolar Depression Rating Scale
  5. Factor 1: psychological depressive symptoms
  6. Factor 2: somatic depressive symptoms
  7. Factor 3: mixed symptoms