Table 5 Exploratory Factor Analysis of the R8 Depression using baseline sample (n = 270)
From: Validation of a novel online depression symptom severity rating scale: the R8 Depression
Test results | |||
Bartlett’s test | Chi-Square = 2897.213 | ||
p < 0.001 | |||
Kaiser–Meyer–Olkin test | 0.906 | ||
Before rotation | |||
Number of factors | 6 | ||
Percentage of variance extracted | 58.6% | ||
Scree test | 1 | ||
Direct Oblimin rotation | (Delta:.0) | ||
First factor | Fourth factor | ||
% of variance | 32.7% | % of variance | 5.1% |
Items | Feeling worthless (0.85) | Items | Appetite change (− 0.93) |
Feeling guilty (0.62) | Weight change (− 0.63) | ||
Feeling hopeless (0.60) | Excessive sleep (− 0.24) | ||
Sadness (0.59) | |||
Sensitivity to criticism (0.59) | |||
Suicidal thoughts (0.53) | |||
Loss of enjoyment (0.39) | Fifth factor | ||
Crying (0.36) | % of variance | 4.4% | |
Socializing (0.36) | Items | Difficulty concentrating (0.66) | |
Second factor | Indecisiveness (0.56) | ||
% of variance | 6.7% | Forgetfulness (0.62) | |
Items | Staying asleep (0.67) | Feeling slow (0.55) | |
Waking early (0.64) | |||
Falling to sleep (0.37) | |||
Feeling restless (0.25) | Sixth factor | ||
Third factor | % of variance | 4.0% | |
% of variance | 5.7% | Items | Anxiety (− 0.65) |
Items | Lack of energy (0.58) | Physical symptoms (− 0.51) | |
Motivation (0.53) | Health worries (− 0.39) | ||
Activities (0.39) | Feeling irritable (− 0.34) |