Table 4. Effect of weighting and propensity scoring on mean body mass index and prevalence of obesity (panel A) and mean waist circumference and prevalence of central obesity (panel B), ages 24-32 Years.
| Panel A: BMI and Obesity | ||||||||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| Add Health [Home], Wave IV (2008) | NHANES [Clinic] (2007-2008) | Odds of obesity in Add Health vs. NHANES | ||||||
|
| ||||||||
| n=13762 | ||||||||
| BMI ≥ 30 | BMI ≥ 30 | Crude | Adjusted | |||||
|
| ||||||||
| n | BMI | % (95% CI) | n | BMI | % (95% CI) | OR (95% CI) | AORb (95% CI) | |
| Unweighted | 13049 | 29 | 37 (36, 38) | 713 | 28 | 31 (28, 35) | 1.3 (1.1, 1.5) | 1.4 (1.1, 1.6) |
| Weighted | 13049 | 29 | 36 (35, 38) | 713 | 28 | 29 (24, 35) | 1.4 (1.1, 1.8) | 1.4 (1.1, 1.8) |
| Propensity-scoreda | 13049 | 29 | 36 (34, 38) | 713 | 28 | 29 (23, 37) | 1.4 (1.0, 1.9) | 1.4 (1.1, 1.8) |
|
| ||||||||
| Panel B: Waist Circumference and Central Obesity | ||||||||
|
| ||||||||
| Add Health [Home], Wave IV (2008) | NHANES [Clinic] (2007-2008) | Odds of Central Obesity in Add Health vs. NHANES | ||||||
|
| ||||||||
| n=13828 | ||||||||
| Central Obesity | Central Obesity | Crude | Adjusted | |||||
|
| ||||||||
| n | Waist | % (95% CI) | n | Waist | % (95% CI) | OR (95% CI) | AORb (95% CI) | |
|
| ||||||||
| Unweighted | 13138 | 98 | 48 (47, 49) | 690 | 94 | 41 (37, 45) | 1.3 (1.1, 1.6) | 1.4 (1.2, 1.7) |
| Weighted | 13138 | 98 | 47 (45, 49) | 690 | 94 | 38 (32, 44) | 1.5 (1.1, 1.9) | 1.5 (1.2, 2.0) |
| Propensity-scoreda | 13138 | 98 | 47 (45, 49) | 690 | 94 | 37 (30, 45) | 1.5 (1.1, 2.0) | 1.5 (1.2, 1.9) |
a
Adjusted for the predicted probability of being in the Add Health (versus NHANES) population conditional on age, sex, race/ethnicity, nativity, education, and income
b
Logistic regression model included all above-listed covariates