Table 4. Unweighted analysis of the association between metabolic syndrome and electronic cigarette exposure.
| Never user (n = 13,459) | Ever user (n = 954) | Current user (n = 325) | P trend | |
|---|---|---|---|---|
| Reference | OR (95% CI) | OR (95% CI) | ||
| Model 1 | 1 | 1.47 (1.25–1.73) | 1.72 (1.33–2.22) | <0.001 |
| Model 2 | 1 | 1.22 (1.03–1.44) | 1.40 (1.08–1.82) | <0.01 |
| Model 3 | 1 | 1.20 (1.01–1.42) | 1.40 (1.08–1.82) | <0.01 |
| Model 4 | 1 | 1.20 (1.01–1.42) | 1.40 (1.08–1.81) | <0.01 |
a) Model 1 was adjusted for age and sex; Model 2 was additionally adjusted for conventional cigarette exposure; Model 3 was additionally adjusted for alcohol consumption; and Model 4 was additionally adjusted for physical activity, household income, and education level.
b) The P-value for trend was measured using a logistic regression analysis considering electronic cigarette exposure as a continuous variable.
OR: odds ratio, CI: confidence interval.