Table 1. Characteristics of Participants in a Study of Associations of the Built Environment in School Neighborhoods With Physical Activity, New York City, 2012.
| Characteristic | Boys (n = 468) |
Girls (n = 484) |
||
|---|---|---|---|---|
| Mean (SD) | ICC | Mean (SD) | ICC | |
| Age, mo | 127.06 (6.75) | — | 126.20 (6.40) | — |
| Body mass index (z score) | 0.77 (1.20) | — | 0.58 (1.20) | — |
| Physical activity frequencya | 10.33 (3.28) | 0.049 | 9.67 (3.49) | 0.065 |
| Light | 3.58 (1.35) | 0.023 | 3.67 (1.27) | 0.081 |
| Medium | 3.57 (1.37) | 0.080 | 3.35 (1.37) | 0.045 |
| Heavy | 3.86 (1.32) | <0.001 | 3.33 (1.39) | 0.008 |
| Physical activity durationb | 9.52 (3.83) | 0.048 | 8.30 (3.68) | 0.061 |
| Light | 3.22 (1.51) | 0.020 | 2.91 (1.43) | 0.058 |
| Medium | 3.35 (1.50) | 0.069 | 2.87 (1.39) | 0.067 |
| Heavy | 3.73 (1.47) | 0.024 | 3.04 (1.46) | 0.010 |
| Self-efficacy of walking for exercisec | 4.37 (1.13) | 0.003 | 4.44 (1.02) | 0.011 |
| Self-efficacy of walking or biking instead of taking a car, bus, or subway to schoolc | 4.16 (1.42) | 0.011 | 4.04 (1.45) | 0.044 |
| Behavioral intentiond | 4.33 (1.16) | 0.068 | 4.33 (1.13) | 0.055 |
| Habit strengthd | 3.82 (1.46) | 0.027 | 3.94 (1.35) | 0.029 |
Abbreviations: —, not applicable; ICC, intraclass correlation coefficient; SD, standard deviation.
Assessed with the questions: light frequency, “In the past week, I did things that got me up and moving”; medium frequency, “In the past week, I did things that made my heart beat a little faster”; and heavy frequency, “In the past week, I did things that got my heart beating really fast.” Response options: 1, 0 times/wk; 2, about 1–2 times/wk; 3, about 3–4 times/wk; 4, almost every day; 5, ≥2 times every day.
Assessed with the questions: light duration, “How long each time did I do things that got me up and moving?”; medium duration, “How long each time did I do things that made my heart beat a little faster?”; and heavy duration, “How long each time did I do things that got my heart beating really fast?” Response options: 1, < .05 h; 2, 0.5 h to 1 h; 3, 2 h; 4, 3 h; 5, >3 h.
Assessed with the question “I am sure I can walk for exercise” or “I am sure I can walk or bike to school instead of taking a car, bus or subway.” Response options: 1, not at all sure; 2, a little sure; 3, neither sure or not sure; 4, sure; 5, very sure.
Assessed with the question “I would like to do more physical activity” or “When I think about myself, physical activity is part of my daily routine.” Response options: 1, not at all true for me; 2, not true for me; 3, neither true or not true; 4, somewhat true for me; 5, very true for me.