Table 2.
Plasma copper concentration, μg/dl | N | No. of case (%) | Model 1 | Model 2 | Model 3 | |||
---|---|---|---|---|---|---|---|---|
OR (95% CI) | P | OR (95% CI) | P | OR (95% CI) | P | |||
Quintiles | ||||||||
Q1 (<80.1) | 516 | 141 (27.3) | Ref | Ref | Ref | |||
Q2 (80.1–89.4) | 516 | 140 (27.1) | 0.99 (0.75, 1.30) | 0.944 | 1.03 (0.77, 1.37) | 0.865 | 1.02 (0.77, 1.36) | 0.886 |
Q3 (89.4–98.2) | 515 | 136 (26.4) | 0.95 (0.72, 1.26) | 0.740 | 0.98 (0.73, 1.31) | 0.867 | 0.97 (0.72, 1.30) | 0.834 |
Q4 (98.2–109.4) | 516 | 128 (24.8) | 0.88 (0.66, 1.16) | 0.357 | 0.93 (0.69, 1.26) | 0.646 | 0.93 (0.69, 1.25) | 0.633 |
Q5 (≥109.4) | 516 | 152 (29.5) | 1.11 (0.85, 1.46) | 0.448 | 1.24 (0.92, 1.66) | 0.163 | 1.20 (0.89, 1.62) | 0.231 |
P for trend | 0.754 | 0.332 | 0.429 | |||||
Q1–4 (<109.4) | 2,063 | 545 (26.4) | Ref | Ref | Ref | |||
Q5 (≥109.4) | 516 | 152 (29.5) | 1.16 (0.94, 1.44) | 0.165 | 1.26 (1.00, 1.58) | 0.048 | 1.23 (0.97, 1.55) | 0.080 |
aData are presented as OR (95% CI) estimated by using logistic regression models. Model 1 was crude model. Model 2 adjusted for potential confounders, including age, sex, current smoking, current alcohol drinking, BMI, family history of diabetes, SBP, DBP, tHcy, TC and TG. Model 3 additionally adjusted for HDL-C.
BMI, body mass index; DBP, diastolic blood pressure; SBP, systolic blood pressure; TC, total cholesterol; TG, triglycerides; tHcy, total homocysteine.