Table 1.
Demographic and Clinical Differences across Depressed with NSSI, Depressed only, and Healthy Control Groups
| HC n = 37 |
DEP n = 36 |
NSSI n = 50 |
Comparison Statistic | |
|---|---|---|---|---|
| Age | F(2, 120) = 0.83 | |||
| m (sd) | 14.49 (1.53) | 14.77 (1.86) | 14.94 (1.54) | |
| IQ | F (2, 120) = 4.14* | |||
| m (sd) | 117.08 a (12.57) | 109.56 b (20.78) | 107.84 b (12.24) | |
| Sex | χ2 (2) = 3.10 | |||
| Male | 19 (51.35%) | 19 (52.78%) | 18 (36%) | |
| Female | 18 (48.65%) | 17 (47.22%) | 32 (64%) | |
| Ethnicity | χ2 (2) = 3.92c | |||
| White | 28 (75.7%) | 20 (55.6%) | 29 (58.0%) | |
| African American | 1 (2.7%) | 7 (19.4%) | 3 (6.0%) | |
| Hispanic | 1 (2.7%) | 6 (16.7%) | 4 (8.0%) | |
| Indian/Asian | 3 (8.1%) | 0 | 3 (6.0%) | |
| Other | 0 | 1 (2.8%) | 11 (22.0%) | |
| Family Income |
χ2 (4) = 13.77** χ2 (2) =0.26d |
|||
| < $35,000 | 10.8% a | 35.3% a | 32.7% a | |
| $35,000–$75,000 | 21.6% a | 35.3% a | 29.4% a | |
| >$75,000 | 67.6% b | 29.4% a | 34.7% a | |
| Family Structure |
χ2 (2) =7.00* χ2 (1) = 0.25d |
|||
| Cohabiting Parents | 86.5% a | 60.0% b | 65.3% b | |
| Single Parents | 13.5% a | 40.0% b | 34.7% b | |
| Medication | ||||
| Anti-depressants | 0a | 12 (33.3%) a,b | 24 (48%) b | χ2 (2) = 24.07*** |
| Adj. Resid. | −4.7 | 0.6 | 3.8 | χ2 (1) = 1.85d |
| Anti-psychotic | 0a | 0a,b | 6.0b | χ2 (2) = 9.29** |
| Adj. Resid. | 1.6 | 1.6 | 3.0 | χ2 (1) = 2.98d |
| Mood stabilizers | 2.0a | 0a | 1.0a | χ2 (2) = 2.31 |
| Adj. Resid | 1.4 | −1.1 | −.3 | χ2 (1) = 0.73d |
| Stimulant | 0a | 4.0b | 6.0b | χ2 (2) = 4.10 |
| Adj. Resid. | −2.2 | 0.8 | 1.3 | χ2 (1) = 0.02d |
| Anxiolitic | 0a | 1.0a | 5.0a | χ2 (2) = 5.07 |
| Adj. Resid. | −1.6 | −.70 | 2.2 | χ2 (1) = 1.68d |
| Abuse/trauma | 0a | 17 (47.2%)b | 24 (48%)b |
χ2 (2) = 26.47*** χ2 (1) =0.01d |
| Adj. Resid. | −5.1 | 2.1 | 2.9 | |
| Total suicide attempts | 0a | 7.0b | 17.0b | χ2 (2) = 15.62*** |
| Adj. Resid. | −3.6 | 0 | 3.4 | χ2 (1) = 2.20d |
| Current suicide ideation | ||||
| m (se) | 1.16 (.26)a | 3.25 (.26)b | 4.48 (.22)c | F (2, 120) = 46.94*** |
| Depression Severity | F (2, 120) = 154.43*** | |||
| m (se) | 20.65 (2.03)a | 60.53 (2.06)b | 65.12 (1.75)b | |
| Depression Chronicity | F (2, 120) = 29.37*** | |||
| m (se) | 0.43 (.32)a | 2.97 (.33)b | 3.58 (.28)b | |
| Anxiety | ||||
| m (se) | 13.68 (2.49)a | 29.74 (2.56)b | 33.65 (2.17)b | F (2, 118) = 19.51*** |
| Self-esteem | F (2, 120) = 89.91*** | |||
| m (se) | 1.38 (.25)a | 5.22 (.25)b | 5.42 (.21)b | |
| Attributional style | ||||
| m (se) | 6.68 (1.01)a | 1.56 (1.02)b | 0.02 (.87)b | F (2, 120) = 492.34*** |
Note. HC = health control group. DEP = depressed without NSSI group. NSSI_DEP = depressed with NSSI group.
Non-shared subscripts (a, b) indicate significant differences in post-hoc Tukey’s tests comparing the three groups.
c
Compares groups for Caucasians vs. non-Caucasians due to discrepant cell sizes for additional ethnicity categories.
d
Statistics represent comparisons between the DEP and NSSI groups only.
*
p < 0.05.
**
p < 0.01.
***
p < 0.001.