Table 3.

Independent predictors of heartburn from regression analysis.

Heartburn >=3d/week Unadjusted					Adjusted*
	Weighted N	Weighted %	Odds Ratio	95% Confidence Interval	Odds Ratio	95% Confidence Interval
BMI, Kg/m2
>=25	7277	35.8	ref		ref
25.1−30	5574	27.4	1.34	1.21−1.47	1.36	1.22−1.52
30.1−35	3381	16.6	2.59	2.34−2.87	2.27	2.00−2.58
≥35.1	4095	20.1	2.54	2.31−2.80	3.27	2.87−3.72
Waist/Hip Ratio, Quartiles
1	5548	27.3	ref		ref
2	4955	24.4	1.90	1.72−2.10	1.88	1.67−2.10
3	4920	24.2	1.40	1.26−1.55	0.98	0.86−1.11
4	4903	24.1	1.48	1.33−1.64	0.97	0.85−1.10
Daily Kcal, Quartiles
1	5527	27.2	ref		ref
2	5257	25.9	1.49	1.34−1.65	2.07	1.79−2.40
3	4648	22.9	1.56	1.40−1.73	4.77	3.97−5.73
4	4894	24.1	2.38	2.15−2.63	4.96	4.00−6.14
Daily Fat Intake (g), Quartiles
1	5478	26.9	ref		ref
2	5174	25.5	1.34	1.21−1.48	1.14	0.99−1.31
3	5117	25.2	1.27	1.15−1.41	0.74	0.62−0.88
4	4557	22.4	2.24	2.03−2.47	1.31	1.07−1.60
Physical Activity Level
Low	2833	13.9	ref		ref
Moderate	7827	38.5	0.42	0.38−0.46	0.32	0.28−0.36
High	9667	47.6	0.48	0.44−0.53	0.40	0.35−0.45
Diabetes Mellitus
No	18632	91.7	ref		ref
Yes	1695	8.3	2.16	1.94−2.40	2.95	2.59−3.36
Harmful Drinking
No	17759	87.4	ref		ref
Yes	2568	12.6	1.71	1.55−1.88	2.55	2.25−2.89
Tobacco Use
None	8571	42.2	ref		ref
Low	6045	29.7	1.30	1.19−1.41	1.42	1.29−1.57
Medium	4732	23.3	1.25	1.15−1.37	1.42	1.27−1.59
High	979	4.8	0.98	0.83−1.15	1.20	0.94−1.53
Likelihood Drug Use
Low	16391	80.6	ref		ref
Moderate	2251	11.1	0.47	0.41−0.54	0.33	0.28−0.39
High	1685	8.3	0.37	0.31−0.45	0.18	0.15−0.23

^*Adjusted for age, gender, and all other variables in the model.