Table 2 

Descriptive statistics (N = 14,689)  
Variable  Definition  Mean/proportion  Standard deviation 
Residential walkability and weight measures  
RESWALK  Factor score for neighbourhood walkability  −0.24  0.98 
BMI  Weight in kg divided by height in meters squared  24.27  4.88 
BMIBG ≥ 25  Proportion of the women with a BMI > 25.0  0.32  0.47 


AGE  Age in years  25.58  3.98 
EDUC  Years of schooling  13.93  1.88 
MARRIED  1 = married  0.89  
BMIYR  Year of pregnancy (1 = 1995… 11 = 2005)  6.02  3.12 
SIBBMI  Average age and year standardized sibling BMI residual  −0.03  0.71 


NSCHOOL  Number of schools  0.61  0.90 
NCHURCH  Number of churches  0.91  0.87 
LIBRARY  Presence of one or more public libraries (1 = yes)  0.04  0.21 
UNDER16  Proportion of the population ≤ Age 15  0.24  0.08 
Zick et al.
Zick et al. International Journal of Behavioral Nutrition and Physical Activity 2013 10:27 doi:10.1186/147958681027