Table 1.
Demographic and Clinical Characteristics of the 103 Participants who completed the Ultimatum Game
| Non-Psychiatric Controls (C) N = 22 | Non-suicidal Depressed (D) N = 35 | Low-Lethality Attempters (LL) N = 20 | High-Lethality Attempters (HL) N = 26 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Measure | M | SD | M | SD | M | SD | M | SD | F or X2 (df) | P Value | Post Hoc, Tukey HSD |
| Age | 64.6 | 11.0 | 66.9 | 7.2 | 62.5 | 6.4 | 62.8 | 10.1 | F(3) = 1.51 | 0.22 | |
| Education, yrs | 15.0 | 1.8 | 14.1 | 2.5 | 13.7 | 2.6 | 13.0 | 3.5 | F(3) = 2.13 | 0.10 | |
| %Men | 46% | 40% | 60% | 65% | X2(2) = 4.8 | 0.19 | |||||
| %White | 77% | 83% | 85% | 100% | X2(2) = 6.01 | 0.12 | |||||
| Global cognition MDRS | 139 | 3.4 | 134 | 4.5 | 133 | 6.5 | 134 | 7.2 | F(3) = 3.68 | 0.02 | C > LL,HL |
| Current depressive severity Hamilton (16Q) | 2.3 | 2.2 | 16.7 | 5.4 | 20.3 | 6.7 | 20.2 | 5.7 | F(3) = 53.2 | <0.01 | C<D<LL,HL |
| IIP Sensitivity | 3.1 | 2.5 | 5.6 | 3.8 | 9.8 | 4.2 | 7.8 | 4.5 | F(3) = 13.8 | <0.01 | C < LL,HL & D < LL |
| Ambivalence | 2.9 | 4.2 | 3.4 | 3.2 | 6.8 | 5.5 | 6.2 | 5.3 | F(3) = 3.66 | 0.02 | C < LL,HL |
| Aggression | 1.4 | 1.5 | 3.8 | 3.4 | 6.8 | 3.2 | 5.0 | 5.4 | F(3) = 8.49 | <0.01 | C<LL.HL & LL>D |
| BIS (total) | 18.2 | 3.0 | 20.9 | 3.3 | 22.9 | 2.9 | 20.8 | 4.9 | F(3) = 9.57 | <0.01 | C < D,LL,HL |
| BIS Non-planning | 11.5 | 6.9 | 16.3 | 7.3 | 18.8 | 9.0 | 21.7 | 8.7 | F(3) = 6.53 | <0.01 | C < LL,HL |
| Household income per capita* (x$ 1000) | 34.6 | 8.3 | 19.9 | 15.3 | 24.6 | 15.7 | 20.5 | 14.9 | F(3) = 0.69 | 0.60 | |
Note. MDRS: Mattis Dementia Rating Scale, SSI: Scale of Suicidal Ideation, SIS: Suicidal Intent Scale, Hamilton: Hamilton Rating Scale for Depression, IIP: Inventory of Interpersonal Problems, BIS: Barratt Impulsiveness Scale, MacArthur Sociodemographic Questionnaire, Household income per person: MacArthur Sociodemographic Questionnaire. HSD: Honestly Significantly Different. Values are given as N, mean (standard deviation), or percentages. Post hoc comparisons were significant at p < 0.05.