Table 1 .
Sample characteristics, stratified by incentive condition
| All (n = 253) | AO (n = 71) | AP (n = 53) | Control (n = 129) | |
|---|---|---|---|---|
| TC age, years | 4.3 (3.8) | 4.6 (4.0) | 3.7 (3.7) | 4.11 (3.31) |
| TC gender, % female | 123 (48.6) | 31 (0.44) | 28 (0.53) | 64 (0.50) |
| TC race/ethnicity | ||||
| Black | 31 (0.12) | 9 (0.13) | 8 (0.15) | 14 (0.11) |
| Hispanic | 126 (0.50) | 36 (0.51) | 30 (0.57) | 60 (0.47) |
| White | 48 (0.19) | 17 (0.24) | 8 (0.15) | 23 (0.18) |
| Other | 48 (0.19) | 9 (0.13) | 7 (0.13) | 32 (0.25) |
| TP age, years | 33.1 (8.8) | 32.6 (8.4) | 32.9 (9.2) | 33.4 (8.9) |
| TP gender, % female | 241 (0.95) | 70 (0.99) | 48 (0.91) | 123 (0.95) |
| TC race/ethnicity | ||||
| Black | 38 (0.15) | 9 (0.13) | 11 (0.21) | 18 (0.14) |
| Hispanic | 98 (0.39) | 28 (0.39) | 22 (0.42) | 48 (0.37) |
| White | 67 (0.26) | 20 (0.28) | 12 (0.23) | 35 (0.27) |
| Other | 50 (0.20) | 14 (0.20) | 8 (0.15) | 28 (0.22) |
| Household income | ||||
| <$10,000 | 46 (0.18) | 18 (0.25) | 8 (0.15) | 20 (0.16) |
| $10,000–29,999 | 82 (0.32) | 26 (0.37) | 16 (0.30) | 40 (0.31) |
| $30,000–49,999 | 54 (0.21) | 10 (0.14) | 9 (0.17) | 35 (0.27) |
| $50,000–69,999 | 23 (0.09) | 3 (0.04) | 9 (0.17) | 11 (0.09) |
| >$70,000 | 22 (0.09) | 6 (0.08) | 7 (0.13) | 9 (0.07) |
| Not reported | 26 (0.10) | 8 (0.11) | 4 (0.08) | 14 (0.11) |
| Mean daily counts, n | 2,924 (3247) | 3,400 (3940) | 2,648 (2594) | 2,775 (3058) |
| Mean daily time > 15,000 counts, % | 3.5 (8.1) | 4.4 (9.7) | 2.9 (6.5) | 3.2 (7.8) |
| Mean daily Particle events, n |
2.5 (4.4) | 2.9 (4.6) | 2.0 (3.2) | 2.5 (4.8) |
| Air nicotine, μg/m3 | 0.4 (1.7) | 0.6 (2.3) | 0.2 (0.6) | 0.3 (1.5) |
Values are mean (standard deviation) for continuous variables and count (proportion) for categorical variables. All values were collected during the baseline phase.
AO aversive only contingency; AP aversive plus reinforcement contingency; TC target child; TP target parent.