Table 1 Participant characteristics stratified by study group assignment
From: Evaluation of a walking school bus program: a cluster randomized controlled trial
Characteristics | Intervention n = 197 | Control n = 221 | Total N = 417 |
|---|---|---|---|
Child age, mean (SD) (years) | 9.3 ± 0.9 | 9.2 ± 1.0 | 9.2 ± 0.9 |
Female, n (%) | 99 (50.2) | 92 (41.8) | 191 (45.8) |
Race/Ethnicity, n (%) | Â | Â | Â |
 Non-Latino white | 20 (10.2) | 49 (22.3) | 69 (16.5) |
 Non-Latino black | 25 (12.7) | 41(18.6) | 66 (15.8) |
 Latino | 58 (29.4) | 58 (26.4) | 116 (27.8) |
 Asian | 32 (16.2) | 21 (9.5) | 53 (12.7) |
 Multi-racial/Other | 24 (12.2) | 15 (6.8) | 39 (9.4) |
 Missing | 38 (19.3) | 37 (16.4) | 74 (17.7) |
Child BMI z-score, mean (SD) | 0.8 ± 1.1 | 0.8 ± 1.0 | 0.8 ± 1.1 |
Distance home to school (miles), mean (SD) | 0.7 ± 0.7 | 1.3 ± 1.5 | 1.0 ± 1.2 |
Neighborhood disorder, mean (SD) | 14.0 ± 6.1 | 15.7 ± 6.4 | 14.9 ± 6.3 |
Parent income, n (%) | Â | Â | Â |
 ≤$20,000 | 47 (23.9) | 50 (22.7) | 97 (23.3) |
 $20,001–$40,000 | 68 (34.5) | 59 (26.8) | 127 (30.5) |
 $40,001-$60,000 | 36 (18.3) | 45 (20.5) | 81 (19.4) |
 ≥$60,001 | 45 (22.8) | 65 (29.5) | 110 (26.4) |
 Missing | 1 (0.0) | 2 (0.0) | 2 (0.0) |
Parent education, n (%) | Â | Â | Â |
 ≤ High school | 73 (37.1) | 61 (27.7) | 134 (32.1) |
 Some college or associate degree | 42 (21.3) | 69 (31.4) | 111 (26.6) |
 ≥ College degree | 37 (18.8) | 57 (25.9) | 94 (22.5) |
 Missing | 45 (22.8) | 33 (15.0) | 78 (18.7) |