Table 2.
Weighted linear regression for MetS z-score in coffee, decaffeinated coffee, and caffeine intake group.
| Characteristic | Model 1 * | Model 2 ** | Model 3 *** | |||
|---|---|---|---|---|---|---|
| Coefficient (95% CI) | p | Coefficient (95% CI) | p | Coefficient (95% CI) | p | |
| Coffee (ref. = nondrinkers) |
||||||
| 0–2 cups | −0.09 (−0.28–0.09) | 0.3 | −0.10 (−0.29–0.08) | 0.29 | −0.07 (−0.22–0.07) | 0.33 |
| >2 cups | −0.19 (−0.35 to −0.02) | 0.03 | −0.17 (−0.33 to −0.01) | 0.04 | −0.13 (−0.24 to −0.01) | 0.04 |
| Decaffeinated Coffee (ref. = nondrinkers) |
||||||
| 0–2 cups | −0.07 (−0.30–0.15) | 0.52 | −0.07 (−0.30–0.16) | 0.53 | −0.01 (−0.19–0.16) | 0.89 |
| >2 cups | −0.05 (−0.35–0.25) | 0.75 | −0.05 (−0.34–0.23) | 0.73 | −0.15 (−0.36–0.05) | 0.15 |
| Caffeine intake (ref. = 0–100 mg) |
||||||
| 100–200 mg | 0.08 (−0.10–0.25) | 0.40 | 0.12 (−0.06–0.30) | 0.2 | 0.02 (−0.12–0.15) | 0.79 |
| >200 mg | −0.07 (−0.24–0.10) | 0.41 | −0.02 (−0.19–0.15) | 0.8 | −0.06 (−0.19–0.06) | 0.31 |
* Model 1 did not adjust for any other variables. ** Model 2 was adjusted for age, education level and PIR. *** Model 3 was adjusted for age, education level, PIR, total energy intake, LDL, fasting insulin, waist circumference, smoke and alcohol exposure, and use of glucocorticoid. CI, confidence interval; Ref., reference. A β-coefficient was calculated by weighted linear regression for MetS z-score.