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. 2020 Aug 11;13:1111–1117. doi: 10.2147/RMHP.S257907

Table 3.

Association Between Incubation Periods and Characteristics of COVID-19 Cases in Multivariate Weibull Regression Model

Variables HR (95% CI) P value (Wald Test) P value (LRT)
Sex 0.549
 Female reference
 Male 1.06 (0.88, 1.27) 0.549
Age (years) 0.048
 <30 reference
 30–59 1.27 (0.99, 1.64) 0.065
 ≥60 1.49 (1.09, 2.05) 0.013
Source of infection 0.050
 Wuhan-imported reference
 Locally infected 0.82 (0.68, 1.00) 0.052

Abbreviations: HR, hazard ratio; CI, confidence interval; LRT, log-likelihood ratio test.