Table 1. Participant characteristics.
| Kidney Donors (n = 16) | Controls (n = 28) | p | |
|---|---|---|---|
| Male/Female (% Male) | 10/6 (62.5%) | 18/10 (64.3%) | 0.906 |
| White/Non-White (% White) | 15/1 (93.8%) | 24/4 (85.7%) | 0.419 |
| Household income | |||
| ≥$60,000 | 11 (68.8%) | 17 (63.0%)a | 0.700 |
| Education | |||
| ≥Four-year degree | 8 (50.0%) | 23 (82.1%) | 0.025 |
| Age M (SD) | 44.81 (9.87) | 42.71 (7.72) | 0.438 |
| IQ M (SD) | 113.19 (12.19) | 113.64 (14.19) | 0.915 |
| IRI Total | 64.81 (13.88) | 61.21 (10.93) | 0.347 |
| EC | 22.94 (4.85) | 19.36 (4.52) | 0.018 |
| PD | 7.31 (4.42) | 7.68 (5.58) | 0.823 |
| FS | 15.31 (5.70) | 15.54 (5.47) | 0.899 |
| PT | 19.25 (3.80) | 18.64 (4.14) | 0.633 |
| SRA | 64.69 (10.01) | 64.86 (11.51) | 0.961 |
| SVOb | |||
| Prosocial | 11 (68.8%) | 15 (53.6%) | 0.325 |
| Individualistic | 3 (18.8%) | 9 (32.1%) | 0.337 |
| Proself | 4 (25.0%) | 10 (35.7%) | 0.463 |
Note. IRI = Interpersonal Reactivity Index, EC = Empathic Concern, PD = Personal Distress, FS = Fantasy Scale, PT = Perspective-Taking, SRA = Self-Report Altruism Scale, SVO = Social Value Orientation. aOne control did not report his/her income. bSix participants (two kidney donors and four controls) were unclassified (not Prosocial, Individualistic, or Competitive) and no participants were classified as Competitive.