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Table 2 Scale characteristics of the factors retained following Principal Components Analysis

From: Could a brief assessment of negative emotions and self-esteem identify adolescents at current and future risk of self-harm in the community? A prospective cohort analysis

Factor Number of items Alpha Scale mean Scale SD Range of summed total Pearson’s correlation with related original measures  
Total score (personal failure, physical symptoms of anxiety/depression and positive self-esteem) 14 0.87 9.06 6.44 0-42 SMFQ 0.80
RCADS total 0.78
CATS personal failure 0.75
−0.81
RSE
Personal failure 3 0.86 1.72 2.53 0-12 CATS personal failure 0.93
Generalised anxiety 5 0.83 3.79 2.88 0-15 RCADS generalised anxiety disorder 0.79
Physical symptoms of anxiety and depression 6 0.82 2.95 2.97 0-15 RCADS depression 0.88
0.72
RCADS panic 0.81
SMFQ
Positive self-esteem 5 0.82 10.51 2.66 0-15 RSE 0.86