Table 2.
Summary Racism Scores and Neighborhood Percent African American in Relation to Risk of Obesity for 12,810 Subjects in the Black Women's Health Study, 1997–2009
| Study Variable | No. of Cases | No. of Person-Years | Age-Adjusteda |
Multivariableb |
||
|---|---|---|---|---|---|---|
| IRR | 95% CI | IRR | 95% CI | |||
| Summary everyday racism (in 1997) | ||||||
| Quartile 1 | 1,105 | 33,235 | 1.00 | Referent | 1.00 | Referent |
| Quartile 2 | 1,234 | 33,142 | 1.12 | 1.03, 1.21 | 1.12 | 1.03, 1.22 |
| Quartile 3 | 933 | 23,077 | 1.22 | 1.12, 1.33 | 1.21 | 1.11, 1.32 |
| Quartile 4 | 1,043 | 23,403 | 1.34 | 1.23, 1.46 | 1.31 | 1.20, 1.43 |
| Ptrend | <0.01 | <0.01 | ||||
| Summary lifetime racism (in 1997) | ||||||
| No to all | 1,385 | 36,999 | 1.00 | Referent | 1.00 | Referent |
| Yes to 1 | 1,511 | 40,497 | 1.00 | 0.93, 1.07 | 1.00 | 0.93, 1.08 |
| Yes to 2 | 1,014 | 25,302 | 1.07 | 0.99, 1.16 | 1.09 | 1.01, 1.19 |
| Yes to 3 | 405 | 10,059 | 1.07 | 0.96, 1.20 | 1.09 | 0.98, 1.22 |
| Ptrend | 0.06 | 0.02 | ||||
| Neighborhood % African American (in 1997) | ||||||
| Quartile 1 | 1,005 | 31,299 | 1.00 | Referent | 1.00 | Referent |
| Quartile 2 | 1,182 | 29,562 | 1.24 | 1.14, 1.35 | 1.12 | 1.02, 1.22 |
| Quartile 3 | 1,153 | 29,379 | 1.21 | 1.12, 1.32 | 1.04 | 0.94, 1.15 |
| Quartile 4 | 975 | 22,617 | 1.35 | 1.24, 1.48 | 1.11 | 0.99, 1.23 |
| Ptrend | <0.01 | 0.25 | ||||
Abbreviations: CI, confidence interval; IRR, incidence rate ratio.
a Adjusted for age and questionnaire cycle.
b Adjusted for age, questionnaire cycle, education, household income, number of people in the household, cigarette smoking, alcohol consumption, vigorous exercise, walking for exercise, hours of television viewing, geographical region, parity, prudent dietary pattern, Western dietary pattern, neighborhood socioeconomic status, and neighborhood housing density.