Table 1
Bivariate Correlations, Means and Standard Deviations of Subtypes of Depression, Suicidal Ideation, and Suicide Risk.
| VARIABLE | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1. PHQ-9: Affective | – | .60** | .15 | .46** |
| 2. PHQ-9: Somatic | – | .21* | .27** | |
| 3. PHQ-9: SI | – | .34** | ||
| 4. Suicide Risk | – | |||
| M | 5.42 | 9.88 | 0.55 | – |
| SD | 2.54 | 3.44 | 0.87 | – |
[i] Note. *p < .05 (two-tailed); **p < .01 (two-tailed); PHQ-9: Patient Health Questionnaire-9; SI: suicidal ideation; 1Suicide risk was dichotomized 0 = little or no risk indicated, 1 = risk indicated; M = mean; SD = standard deviation.
Table 2
Linear Regression Analysis of the Association Between Subtypes of Depression and Suicidal Ideation.
| PREDICTOR | R2 | B | SE B | β | t | p | 95% CI [LL, UL] |
|---|---|---|---|---|---|---|---|
| 1. PHQ-9: Affective | 0.21** | 0.16 | .035 | 0.47 | 4.60 | <.001** | [0.09, 0.23] |
| 2. PHQ-9: Somatic | –.001 | 0.03 | –.004 | –0.04 | 0.97 | [–0.05, 0.05] |
[i] Note. **p < .01 (two-tailed); PHQ-9: Patient Health Questionnaire-9; B = unstandardized coefficient; SE B = standard error of unstandardized coefficient; β = standardized coefficient; CI = confidence interval; Multicollinearity concerns were not detected as all tolerance values exceeded .20 (minimum tolerance = .56) and VIF was below 5 (maximum VIF = 1.79).
Table 3
Multivariate Logistical Regression Analysis of the Association Between Subtypes of Depression and Suicide Risk.
| PREDICTOR | B | SE | p | WALD | OR(Exp(B)) | 95% CI [LL, UL] |
|---|---|---|---|---|---|---|
| PHQ-9: Affective | 0.04 | 0.10 | .70 | .15 | 1.04 | [0.86, 1.26] |
| PHQ-9: Somatic | 0.13 | 0.08 | .09 | 2.95 | 1.14 | [0.98, 1.32] |
[i] Note. PHQ-9: Patient Health Questionnaire-9; B = unstandardized coefficient; SE = standard error; OR = odds ratio; CI = confidence interval.
Table 4
Multivariate Logistical Regression Analysis of the Association Between Subtypes of Depression and Suicidal Ideation with Suicide Risk as the Dependent Variable.
| PREDICTOR | B | SE | p | WALD | OR (Exp(B)) | 95% CI [LL, UL] |
|---|---|---|---|---|---|---|
| PHQ-9: SI | 0.82 | 0.27 | .003* | 9.08 | 2.27 | [1.33, 3.87] |
| PHQ-9: Affective | –0.11 | 0.12 | .33 | 0.94 | 0.90 | [0.72, 1.12] |
| PHQ-9: Somatic | 0.15 | 0.08 | .05 | 3.75 | 1.17 | [1.00, 1.36] |
[i] Note. *p < .01 (two-tailed); PHQ-9: Patient Health Questionnaire-9; SI: suicidal ideation; B = unstandardized coefficient; SE = standard error; OR = odds ratio; CI = confidence interval.
Table 5
Bivariate Correlations, Means and Standard Deviations of Specific Somatic Depression Symptoms and Suicide Risk.
| VARIABLE | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| 1. PHQ-9: Sleep | – | .45** | .43** | .27** | .26** | .01 |
| 2. PHQ-9: Fatigue | – | .52** | .46** | .40** | .19* | |
| 3. PHQ-9: Appetite | – | .43** | .42** | .23** | ||
| 4. PHQ-9: Concentration | – | .48** | .12 | |||
| 5. PHQ-9: Psychomotor Disturbance | – | .27** | ||||
| 6. Suicide Risk1 | – | |||||
| M | 2.39 | 2.31 | 1.81 | 1.93 | 1.48 | – |
| SD | 0.86 | 0.81 | 1.01 | 0.99 | 1.08 | – |
[i] Note. *p < .05 (two-tailed); **p < .01 (two-tailed); PHQ-9: Patient Health Questionnaire-9; 1Suicide risk was dichotomized 0 = little or no risk indicated, 1 = risk indicated; M = mean; SD = standard deviation.