Table 3.

Associations of High-Level D Dimer With the Early Intubation in the Propensity Score Analyses

Analysis	OR	95% CI	p values
Multi-variable analysis
With inverse probability weightinga	2.05	1.25 ∼ 3.36	0.004*
With matchingb	2.22	1.23 ∼ 4.00	0.008*
Adjusted for propensity scorec	1.84	1.09 ∼ 3.10	0.022*

D-dimer was divided into low-level (<8.7 mg/L) and high-level (≥8.7 mg/L) groups for propensity score analyses, based on the median value of all patients' D-dimer.

^* The p value is under 0.05, which is considered statistically significant.

^a Primary analysis with a multi-variable logistic regression model with the same strata and covariates, with inverse probability weighting according to the propensity score.

^b Multi-variable logistic regression model with the same strata and covariates, with matching according to the propensity score. The analysis included 420 patients (210 low-level D-dimer and 210 high-level D-dimer).

^c Multi-variable logistic regression model with the same strata and covariates, with additional adjustment for the propensity score.

OR, odds range; 95% CI, 95% confidence interval.