Table 2.
Differences in Volunteers and Nonvolunteers
| Volunteers (39%) | Nonvolunteers (61%) | Statistic | |
|---|---|---|---|
| Gender, % (N) | |||
| Male | 35.9 (265) | 64.1 (473) | χ 2 (1, N = 1,626) = 7.73, p = .005 |
| Female | 42.7 (379) | 57.3 (509) | |
| Race, % (N) | |||
| White | 42.7 (452) | 57.3 (606) | χ 2 (1, N = 1,584) = 10.59, p = .001 |
| Black/other | 34.2 (180) | 65.8 (346) | |
| Education, mean (SD) | 15.76 (2.64) | 14.39 (2.98) | t(1,595) = −9.44, p <.001 |
| Household income, mean (SD) | 4.34 (2.26) | 3.61 (2.10) | t(1,551) = −6.50, p <.001 |
| Employment status, % (N) | |||
| Employed | 42.3 (427) | 57.7 (582) | χ 2(1, N = 1,600) = 6.12, p = .013 |
| Not employed | 36.0 (213) | 64.0 (378) | |
| Current marital status, % (N) | |||
| Married | 44.3 (344) | 55.7 (433) | χ 2 (1, N = 1,626) = 13.55, p = .001 |
| Not married | 35.3 (300) | 64.7 (549) | |
| Extraversion, mean (SD) | 2.35 (0.37) | 2.19 (0.38) | t(1,501) = −8.03, p < .001 |
| Agreeableness, mean (SD) | 2.76 (0.31) | 2.66 (0.32) | t(1,499) = −6.09, p < .001 |
| Conscientiousness, mean (SD) | 2.62 (0.35) | 2.54 (0.36) | t(1,503) = −3.96, p < .001 |
| Openness, mean (SD) | 2.40 (.39) | 2.30 (0.37) | t(1,497) = −4.58, p < .001 |
| Neuroticism, mean (SD) | 1.43 (0.43) | 1.55 (0.43) | t(1,504) = 5.60, p < .001 |
| Physical functioning, mean (SD) | 51.26 (8.62) | 48.48 (10.82) | t(1,580) = −5.41, p < .001 |
| Mental health, mean (SD) | 61.73 (7.74) | 59.56 (9.21) | t(1,580) = −4.86, p < .001 |
Note. Number of participants varies by amount of complete data available.