| Tertiles of Cu/Zn ratio | P for trend | ||
---|---|---|---|---|
1 (≤ 1.07) | 2 (1.08–1.38) | 3 (≥ 1.39) | ||
Total | ||||
 Knee chondrocalcinosis (%) | 0.7 | 1.0 | 2.1 | – |
 N for kneea | 8158 | 8406 | 8157 | – |
 Model 1 (95% CI) | 1.00 (reference) | 1.02 (0.61, 1.69) | 2.23 (1.38, 3.59) | < 0.001 |
 Model 2 (95% CI) | 1.00 (reference) | 1.00 (0.60, 1.67) | 2.12 (1.31, 3.42) | < 0.001 |
 Model 3 (95% CI) | 1.00 (reference) | 1.03 (0.62, 1.72) | 2.27 (1.40, 3.68) | < 0.001 |
 Model 4 (95% CI) | 1.00 (reference) | 1.03 (0.62, 1.71) | 2.26 (1.41, 3.63) | < 0.001 |
 Model 5 (95% CI) | 1.00 (reference) | 1.01 (0.61, 1.68) | 2.20 (1.36, 3.55) | < 0.001 |