TABLE 2.
Correlations Between Body Mass Index and Physical Activity by Quartiles of the County Sprawl Index: United States, Nurses’ Health Study, 2000, and Nurses’ Health Study II, 2001
| County Sprawl Index, quartilea | Age Adjusted, B (95% CI) | Fully Adjusted,b B (95% CI) |
|---|---|---|
| BMI, kg/m2 | ||
| 1 (Ref) | 1.00 | 1.00 |
| 2 | −0.17 (−0.32, −0.03) | −0.13 (−0.27, 0.00) |
| 3 | −0.36 (−0.52, −0.20) | −0.29 (−0.43, −0.14) |
| 4 | −0.43 (−0.61, −0.25) | −0.37 (−0.53, −0.20) |
| Total activity, MET h/wk | ||
| 1 (Ref) | 1.00 | 1.00 |
| 2 | 0.37 (−0.25, 0.99) | 0.20 (−0.39, 0.79) |
| 3 | 1.05 (0.38, 1.72) | 0.74 (0.11, 1.37) |
| 4 | 1.00 (0.24, 1.76) | 0.67 (−0.05, 1.39) |
| Walking, MET h/wk | ||
| 1 (Ref) | 1.00 | 1.00 |
| 2 | 0.02 (−0.18, 0.21) | −0.02 (−0.21, 0.18) |
| 3 | 0.16 (−0.05, 0.37) | 0.11 (−0.10, 0.31) |
| 4 | 0.38 (0.15, 0.62) | 0.33 (0.10, 0.56) |
| Combined walking, bicycling, jogging, and running, MET h/wk | ||
| 1 (Ref) | 1.00 | 1.00 |
| 2 | 0.32 (−0.02, 0.65) | 0.24 (−0.09, 0.56) |
| 3 | 0.62 (0.26, 0.98) | 0.49 (0.15, 0.84) |
| 4 | 0.86 (0.45, 1.27) | 0.72 (0.33, 1.12) |
Note. BMI = body mass index; CI = confidence interval; MET = metabolic equivalent.
a
Quartile 1: from Jackson County, GA (62.55), to Allen County, IN (97.44); quartile 2: from Lawrence County, OH (97.44), to Lancaster County, NE (106.62); quartile 3: from Monongalia County, WV (106.62), to Contra Costa County, CA (115.77); quartile 4: from Santa Barbara County, CA (115.77), to New York County, NY (352.07).
b
Adjusted for age, smoking, race, and husband’s education.