From: Psychometric analysis of the brief symptom inventory 18 (BSI-18) in a representative German sample
No | Item | M (SD) | Corrected item-total correlation | α Without the item | PHQ-Depression correlations | PHQ-Anxiety correlations |
---|---|---|---|---|---|---|
Scale 1: Somatization (α = .82) | ∑1.46 (2.58) |  |  | .52** | .48** | |
1 | Faintness or dizziness | 0.19 (0.51) | .56 | .80 | Â | Â |
4 | Pains in heart or chest | 0.23 (0.56) | .61 | .79 | Â | Â |
7 | Nausea or upset stomach | 0.28 (0.63) | .49 | .81 | Â | Â |
10 | Trouble getting your breath | 0.22 (0.57) | .65 | .78 | Â | Â |
13 | Numbness or tingling in parts of your body | 0.22 (0.60) | .55 | .80 | Â | Â |
16 | Feeling weak in parts of your body | 0.33 (0.69) | .66 | .77 | Â | Â |
Scale 2: Depression (α = .87) | ∑1.76 (3.23) |  |  | .72** | .71** | |
2 | Feeling no interest in things | 0.36 (0.69) | .67 | .85 | Â | Â |
5 | Feeling lonely | 0.42 (0.82) | .66 | .85 | Â | Â |
8 | Feeling blue | 0.27 (0.67) | .78 | .83 | Â | Â |
11 | Feelings of worthlessness | 0.26 (0.69) | .74 | .83 | Â | Â |
14 | Feeling hopeless about the future | 0.39 (0.83) | .73 | .84 | Â | Â |
17 | Thoughts of ending your life | 0.07 (0.36) | .51 | .88 | Â | Â |
Scale 3: Anxiety (α = .84) | ∑1.44 (2.59) |  |  | .63** | .72** | |
3 | Nervousness or shakiness inside | 0.27 (0.62) | .66 | .80 | Â | Â |
6 | Feeling tense or keyed up | 0.50 (0.77) | .59 | .83 | Â | Â |
9 | Suddenly scared for no reason | 0.17 (0.50) | .62 | .81 | Â | Â |
12 | Spells of terror or panic | 0.10 (0.39) | .66 | .82 | Â | Â |
15 | Feeling so restless you couldn’t sit still | 0.23 (0.60) | .66 | .80 |  |  |
18 | Feeling fearful | 0.19 (0.53) | .63 | .81 | Â | Â |
Global Severity Index (α = .93) | ∑4.66 (7.44) |  |  | .71** | .73** |