Table 4.
Intakes of restaurant burgers in relation to obesity risk, jointly stratified by baseline BMI and age, in the Black Women's Health Study, 1995–2009a
| Baseline age 21–29 y |
Baseline age 30–39 y |
|||||
|---|---|---|---|---|---|---|
| Cases | HR (95% CI)b | HR (95% CI)c | Cases | HR (95% CI)b | HR (95% CI)c | |
| Baseline BMI 18.5–24.9 kg/m2 | ||||||
| <5 times/yr | 253 | 1.00 | 1.00 | 328 | 1.00 | 1.00 |
| 5–11/yr | 177 | 1.25 (1.03–1.52) | 1.22 (1.00–1.49) | 176 | 1.02 (0.84–1.23) | 1.03 (0.85–1.24) |
| 1–3/mo | 272 | 1.19 (0.99–1.43) | 1.14 (0.95–1.38) | 213 | 1.02 (0.84–1.23) | 1.03 (0.85–1.24) |
| 1/wk | 136 | 1.20 (0.95–1.51) | 1.14 (0.91–1.44) | 127 | 1.25 (0.99–1.56) | 1.26 (1.00–1.58) |
| ≥2/wk | 106 | 1.67 (1.29–2.17) | 1.60 (1.23–2.08) | 48 | 1.33 (0.96–1.84) | 1.35 (0.97–1.88) |
| P-trend | 0.002 | 0.008 | 0.05 | 0.04 | ||
| Baseline BMI 25.0–29.9 kg/m2 | ||||||
| <5 times/yr | 492 | 1.00 | 1.00 | 1014 | 1.00 | 1.00 |
| 5–11/yr | 367 | 1.08 (0.94–1.24) | 1.08 (0.94–1.24) | 697 | 1.03 (0.93–1.14) | 1.03 (0.93–1.14) |
| 1–3/mo | 546 | 1.12 (0.98–1.27) | 1.12 (0.98–1.27) | 871 | 1.10 (0.99–1.21) | 1.10 (0.99–1.21) |
| 1/wk | 300 | 1.13 (0.96–1.33) | 1.13 (0.96–1.33) | 433 | 1.07 (0.95–1.22) | 1.08 (0.95–1.22) |
| ≥2/wk | 189 | 1.32 (1.09–1.59) | 1.30 (1.08–1.57) | 202 | 1.07 (0.91–1.26) | 1.07 (0.91–1.26) |
| P-trend | 0.007 | 0.01 | 0.13 | 0.12 | ||
a
HR, hazard ratio.
b
Adjusted for age, baseline BMI, vigorous physical activity, walking for exercise, education, geographic region, smoking status, alcohol intake, parity, and prudent and Western dietary patterns.
c
Additionally adjusted for sugar-sweetened soft drinks.