Table 2.

Fit of parametric survival models for estimation of duration of virus persistence in upper respiratory tract of asymptomatic SARS-CoV-2 infected individuals (n = 44)

Type of distribution used in model	Minus 2 log likelihood value	No. of model parameters (k)	AIC value (−2 log likelihood +2k)
Weibull	250.15	2	254.15
Log-normal	244.22	2	248.22
Log-logistic	243.39	2	247.39
Gamma	245.90	2	249.90
Generalized gamma	244.22	3	250.22

AIC, Akaike information criterion.