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Table 3 Factor matrix for the ULS-6 in suicide cases and living controls

From: The validity of proxy-based data on loneliness in suicide research: a case-control psychological autopsy study in rural China

Item description Suicide cases (n = 242) Living controls (n = 242)
Mean (SD) Factor 1 Mean (SD) Factor 1
1. I lack companionship. 2.75 (0.99) 0.849 1.98 (0.92) 0.793
2. There is no one I can turn to. 2.60 (0.94) 0.856 1.85 (0.83) 0.839
3. I feel left out. 2.67 (0.94) 0.916 1.81 (0.82) 0.880
4. I feel isolated from others. 2.52 (0.94) 0.898 1.77 (0.75) 0.875
5. I am unhappy being so withdrawn. 2.47 (0.90) 0.844 1.72 (0.71) 0.789
6. People are around me but not with me. 2.54 (0.99) 0.898 1.85 (0.83) 0.781
The total score of ULS-6 15.55 (5.00)   10.99 (4.01)  
Eigenvalue   4.619   4.106
Proportion of explained variance (%)   76.991   68.425