Table 4.
Comparison Between Participants and Eligible Nonparticipants on Education, Income, and Age
| Variable | Participants M (SD) | Nonparticipants M (SD) | p |
|---|---|---|---|
| BM education | 4.87 (3.03) | 4.64 (3.04) | 0.29 |
| BM income | 1.23 (0.69) | 1.17 (0.54) | 0.32 |
| BM age | 23.84 (6.02) | 24.58 (6.44) | 0.08 |
| BF education | 5.09 (3.23) | 5.47 (3.64) | 0.32 |
| BF income | 1.29 (0.64) | 1.19 (0.44) | 0.24 |
| BF age | 25.61 (7.36) | 27.30 (8.25) | 0.01 |
| AM education | 9.18 (l.84) | 8.67 (2.44) | 0.001 |
| AM age | 36.98 (5.55) | 37.54 (5.96) | 0.15 |
| AF education | 8.86 (2.32) | 8.56 (2.56) | 0.09 |
| AF age | 37.82 (5.76) | 38.34 (6.31) | 0.20 |
| AP income | 5.01 (1.17) | 4.86 (1.27) | 0.09 |
Note: BM = birth mother. BF = birth father. AM = adoptive mother. AF = adoptive father. AP = adoptive parents. Education: 1 (< 8th grade), 2 (Completed 8th grade), 3 (Completed 12th grade), 4 (Some trade school), 5 (Completed trade school), 6 (Some junior college), 7 (Completed junior college), 8 (Some college), 9 (Completed college), 10 (Some professional/graduate school), 11 (Completed professional/graduate school). Income: 1 = $20,000 or less; 3 = $40,000-59,999; 5 = $80,000-99,999.