Table 6 Combined exploratory factor analysis of MADRS, BDI and HAMD, single loadings above 0.4 in a three-factor solution, single factor loadings, explained variance and internal consistency (Cronbach’s alpha)
Item | Factor 1 | Factor 2 | Factor 3 |
|---|---|---|---|
MADRS 1-Apparent sadness | -0.64 | ||
MADRS 2-Reported sadness | -0.63 | ||
MADRS 3-Inner tension | -0.63 | ||
MADRS 4-Reduced sleep | 0.73 | ||
MADRS 5-Reduced appetite | 0.74 | ||
MADRS 6-Concentration | -0.73 | ||
MADRS 7-Lassitude | -0.77 | ||
MADRS 8-Inhability to feel | -0.72 | ||
MADRS 9-Pessimistic thoughts | -0.68 | ||
MADRS 10-Suicidal thoughts | |||
HAMD 1-Depressed mood | -0.55 | ||
HAMD 2-Feelings of guilt | -0.51 | ||
HAMD 3-Suicide | |||
HAMD 4-Insomnia early | 0.60 | ||
HAMD 5-Insomnia middle | 0.66 | ||
HAMD 6-Insomnia late | 0.65 | ||
HAMD 7-Work and activities | -0.68 | ||
HAMD 8-Retardation | -0.68 | ||
HAMD 9-Agitation | -0.44 | ||
HAMD 10-Psychic anxiety | -0.50 | ||
HAMD 11-Somatic anxiety | -0.51 | ||
HAMD 12-Loss of appetite | 0.60 | ||
HAMD 13-Somatic symptoms | -0.58 | ||
HAMD 14-Genital symptoms | -0.42 | ||
HAMD 15-Hypochondrias | -0.46 | ||
HAMD 16-Loss of weight | 0.73 | ||
HAMD 17-Insight | |||
BDI A-Sadness | -0.63 | ||
BDI B-Future pessimism | -0.70 | ||
BDI C-Feeling like failure | -0.79 | ||
BDI D-Lack of enjoyment | -0.70 | ||
BDI E-Guilt | -0.74 | ||
BDI F-Feelings beeing punished | -0.59 | ||
BDI G-Dissapointment oneself | -0.78 | ||
BDI H-Self blame | -0.76 | ||
BDI I-Suicidal thoughts | -0.67 | ||
BDI J-Crying | -0.48 | ||
BDI K-Irritability | -0.53 | ||
BDI L-Interest in people | -0.66 | ||
BDI M-Making decisions | -0.67 | ||
BDI N-Appearence | -0.58 | ||
BDI O-Work | -0.62 | ||
BDI P-Sleep | 0.51 | ||
BDI Q-Tiredness | -0.55 | ||
BDI R-Appetite | 0.53 | ||
BDI S-Weight loss | 0.65 | ||
BDI T-Health anxiety | |||
BDI U-Interest in sex | -0.47 | ||
SS loadings | 6.68 | 7.81 | 4.79 |
Proportion Var | 0.14 | 0.16 | 0.10 |
Cumulative Var | 0.14 | 0.30 | 0.40 |
C’s alpha (overal = 0.94) | 0.91 | 0.91 | 0.84 |