Higher urinary nitrate was associated with lower prevalence of congestive heart failure: results from NHANES

Table 4 Logistic regression results for relationship between urinary nitrate levels and congestive heart failure stratified by age groups and genders respectively

Urinary nitrate^a	20–60 year OR (95%CI)	60+ year OR (95%CI)	Male OR (95%CI)	Female OR (95%CI)
Q1	Ref	Ref	Ref	Ref
Q2	0.621 (0.287, 1.343)	0.621 (0.359, 1.077)	0.629 (0.343, 1.152)	0.690 (0.354, 1.344)
Q3	0.224 (0.082, 0.608)	0.508 (0.255, 1.011)	0.356 (0.138, 0.915)	0.600 (0.290, 1.242)
Q4	0.195 (0.071, 0.534)	0.485 (0.251, 0.936)	0.441 (0.217, 0.899)	0.201 (0.076, 0.530)
P for trend	< 0.001	0.011	0.009	0.004

All models were adjusted by age, gender, race/ethnicity, poverty income ratio, cotinine, BMI, hypertension, hypercholesterolemia and diabetes (poverty income ratio: Q1: ≤ 1, Q2: > 1; cotinine: Q1: ≤ 0.01, Q2: 0.01–10, Q3: > 10; BMI: Q1: < 25; Q2: 25–30; Q3: > 30)
^aUrinary nitrate was divided to four levels by quartile (Q1: ≤ 26,100; Q2: 26,100–45,000; Q3: 45,000–70,600; Q4: > 70,600)

ISSN: 1471-2261