Table 3.
Results from Multivariable Mixed Models for the effect of Lifecourse SEP variables on BMI at baseline and change in BMI in Blacks (n=1174) and Whites (n=2323) in the American Changing Lives cohort 1986–2002: Interactions by sex
| Blacks | Whites | |||
|---|---|---|---|---|
| Estimate | 95% CI | Estimate | 95% CI | |
| Interecept(BMI at age 25) | 23.122 | (18.299, 27.944) | 25.277 | (21.914, 28.640) |
| Males (Ref) vs females | −11.177 | (−18.074, −4.279) | −7.932 | (−12.60, −3.263) |
| Father's education > =12 years vs. <12 yr(Ref) | −0.689 | (−1.635,0.257) | −0.594 | (−1.057, −0.131) |
| Childhood SES Better off/average vs worse(Ref) | 0.547 | (−0.242, 1.337) | 0.249 | (−0.260, 0.758) |
| Education> =12 years vs. <12 yr (Ref) | −1.250 | (−2.009, −0.490) | −0.812 | (−1.296,−0.329) |
| Baseline income (females) | 0.150 | (−0.334, 0.634) | −0.170 | (−0.496, 0.155) |
| Baseline income(males) | 1.307 | (0.695, 1.942) | 0.809 | (0.397, 1.221) |
| Baseline financial security(females) | −0.541 | (−0.915, −0.167) | −0.109 | (−0.368, 0.150) |
| Baseline financial security(males) | 0.386 | (−0.153, 0.926) | −0.262 | (−0.585, 0.060) |
| Time (Change in BMI/year) | 0.324 | (0.041, 0.608) | −0.002 | (−0.190 0.186) |
| Time*Males (Ref) vs females | −0.017 | (−0.062, 0.028) | −0.029 | (−0.052, 0.006) |
| Time* Childhood SES Better off/average vs. worse(Ref) | −0.012 | (−0.063, 0.039) | 0.036 | (0.003, 0.069) |
| Time* baseline income | 0.000 | (−0.027, 0.028) | 0.021 | (0.003, 0.038) |
| Time* baseline financial security | −0.001 | (−0.023, 0.021) | −0.018 | (−0.032, −0.004) |
a
All models adjusted for age, sex, sex*time, age*time height and number of children BMI=Body Mass Index, SEP= Socioeconomic Position, 95% CI=95% Confidence Interval Bold numbers represent statistical significance at 0.05 level
To make the models comparable between the two racial groups we retained all variables that were significant for either of the two groups at alpha=0.05 level. Main effect of childhood SES was included because the interaction between childhood SES and time was significant for Whites.