Table 4. Fully Adjusted Hazard Ratios for the Association Between Waist Circumference and Coronary Heart Disease, Stratified by Zip Code–Level Poverty, Among White Women and African American Women Participating in the REGARDS Study.
| Quartile of waist circumferenceb | ≤35.8% of Population in zip code lives in povertya |
>35.8% of Population in zip code lives in poverty |
||||
|---|---|---|---|---|---|---|
| No. in sample (no. of CHD events)c | HR (95% CI) | P value | No. in sample (no. of CHD events)c | HR (95% CI) | P value | |
| White women | ||||||
| Quartile 1 | 1,624 (59) | 1 [Reference] | 760 (29) | 1 [Reference] | ||
| Quartile 2 | 1,299 (56) | 1.06 (0.73–1.54) | .75 | 647 (25) | 0.79 (0.46–1.36) | .40 |
| Quartile 3 | 963 (41) | 0.97 (0.64–1.46) | .87 | 555 (37) | 1.33(0.80–2.19) | .27 |
| Quartile 4 | 905 (59) | 1.49 (1.00–2.21) | .05 | 551 (51) | 1.77 (1.07–2.94) | .03 |
| African American womend | ||||||
| Quartile 1 | 214 (9) | 1 [Reference] | 642 (20) | 1 [Reference] | ||
| Quartile 2 | 415 (11) | 0.54 (0.22–1.31) | .17 | 1,019 (45) | 1.35 (0.79–2.29) | .27 |
| Quartile 3 | 415 (16) | 0.79 (0.34–1.82) | .58 | 1,195 (57) | 1.34 (0.80–2.25) | .27 |
| Quartile 4 | 528 (37) | 1.52 (0.70–3.30) | .29 | 1,743 (130) | 2.10 (1.29–3.24) | <.001 |
Abbreviations: CHD, coronary heart disease; HR, hazard ratio; REGARDS, REasons for Geographic and Racial Differences in Stroke.
a
On the basis of data distribution, poverty level was a median split at >35.8% of the population in zip code living in poverty and ≤35.8% of the population in zip code living in poverty.
b
Quartile 1: women, <32.0 in; Quartile 2: women, ≥32.0 to <36.0 in; Quartile 3: women, ≥36 to <40.0 in. Quartile 4: women ≥40 in.
c
Participants were recruited and baseline data were collected from January 2003 through October 2007. Data on number of CHD events were collected through December 31, 2017.
d
HRs for African American women should be interpreted with caution because of the small number of CHD events in each quartile.