Table 2 

Geometric mean serum hormone concentrations by categories of BMI 

BMI CATEGORY 



Normal weight 
Overweight 
Obese 

BMI categories 
(BMI ≤ 25) 
(BMI > 25 to ≤ 30) 
(BMI > 30) 
Ptrend^{††} 

N 
20 
17 
14 

Model 
Mean, 95%, CI 
Mean, 95%, CI 
Mean, 95%, CI 



Leptin, ng/mL 
1^{†} 
8.59 (6.15–12.02) 
16.32 (10.98–24.26) 
30.09 (20.61–43.93) 
< 0.0001 


^{† }Model 1 (n = 51) adjusted for age, race, family history of breast cancer, parity and menarche < 12 years. Multiple R^{2 }= 0.56 ^{††}Ptrend from linear regression models where trend is measured as a continuous value after assigning the normal weight category 0, overweight category 1, and obese category 2. Pvalues for these models where BMI is measured as a noncategorized continuous variable are available in Table 3. 

Mahabir et al. Nutrition Journal 2007 6:3 doi:10.1186/1475289163 