Skip to main content

Table 2 Weighted odds ratios and 95% confidence intervals for elevated blood pressure according to quartiles of serum copper

From: The association between serum copper concentrations and elevated blood pressure in US children and adolescents: National Health and Nutrition Examination Survey 2011–2016

Serum copper (μg/dL) Events/cases OR(95%CI)
Crude Model1a Model 2b
Quartile 1 27/312 Ref Ref Ref
Quartile 2 30/279 1.14 (0.66–1.96) 1.87 (1.05–3.32) * 1.80 (0.94–3.43)
Quartile 3 45/267 1.78 (1.07–2.95) * 3.37 (1.94–5.85) ** 3.70 (1.97–6.95) **
Quartile 4 72/237 3.21 (2.00–5.16) ** 5.44 (3.21–9.22) ** 5.26 (2.76–10.03) **
P for trend NA < 0.001 < 0.001 < 0.001
Per 1 SD serum copper   1.52 (1.32–1.75) ** 1.76 (1.50–2.06) ** 1.69 (1.38–2.07)**
  1. CI, confidence interval; OR, odds ratio; NA, not applicable; SD, standard deviation
  2. *P < 0.05; **P < 0.01
  3. aModel 1 were adjusted by age and sex
  4. bModel 2 were adjusted by age, sex, race, family monthly poverty level category, physical activity, body mass index, total energy intake, serum cotinine, and other trace metals