Table 3. Quantile regression coefficient (P-value) of dietary mineral intakes and WC (NHANES, 2007–2014)a.
| Modelc | Minerals | Quantilesb | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | ||
| 1 | Ca | −0.84 (0.04) | −1.16 (<0.01) | −1.48 (<0.01) | −1.47 (<0.01) | −1.50 (<0.01) | −1.44 (<0.01) | −1.84 (<0.01) | −2.20 (<0.01) | −1.87 (0.01) |
| Mg | −5.28 (<0.01) | −7.52 (<0.01) | −9.22 (<0.01) | −10.12 (<0.01) | −11.79 (<0.01) | −10.58 (<0.01) | −11.97 (<0.01) | −14.21 (<0.01) | −13.51 (<0.01) | |
| Cu | −0.26 (0.27) | −0.48 (<0.01) | −0.72 (<0.01) | −1.02 (<0.01) | −1.04 (<0.01) | −0.92 (<0.01) | −0.76 (0.01) | −0.64 (0.07) | −0.61 (0.01) | |
| Na | 0.26 (0.34) | 0.45 (0.03) | 0.65 (<0.01) | 0.73 (<0.01) | 0.96 (<0.01) | 1.08 (<0.01) | 1.44 (<0.01) | 1.98 (<0.01) | 2.26 (<0.01) | |
| K | −0.66 (0.01) | −1.15 (<0.01) | −1.31 (<0.01) | −1.67 (<0.01) | −2.15 (<0.01) | −1.99 (<0.01) | −2.38 (<0.001) | −2.61 (<0.01) | −2.66 (<0.01) | |
| P | 0.60 (0.33) | 0.82 (0.14) | 0.33 (0.40) | 0.27 (0.61) | 0.19 (0.78) | 0.02 (0.97) | 0.06 (0.93) | 0.71 (0.49) | 0.18 (0.86) | |
| Se | 0.49 (0.85) | 0.42 (0.77) | 0.36 (0.81) | 0.31 (0.91) | 0.25 (0.93) | 0.19 (0.93) | 0.13 (0.96) | 0.04 (0.99) | −0.10 (0.98) | |
| 2 | Fe | −21.45 (0.40) | −25.69 (0.05) | −41.61 (0.01) | −63.52 (<0.01) | −51.98 (0.05) | −37.25 (0.11) | −16.88 (0.41) | −1.94 (0.95) | 24.99 (0.58) |
| 3 | Zn | −9.82 (0.50) | −17.73 (0.15) | −31.63 (0.02) | −42.03 (0.05) | −22.45 (0.21) | −23.84 (<0.01) | −31.09 (0.04) | −41.05 (0.05) | −39.55 (0.14) |
Notes:
a
Calculated using quantile regression, models adjusted for age, gender, energy.
b
Quantile regression coefficient and P-value.
c
Model 1, Quantile regression analysis of independent variables without collinearity and WC; Model 2–3, Quantile regression analysis of WC and collinear independent variables, respectively.
Ca, Calcium; Mg, Magnesium; Cu, Copper; Na, Sodium; K, Potassium; Fe, Iron; P, Phosphorus; Se, Selenium; Zn, Zinc.