Volume 21, Number 12—December 2015
Dispatch
Kinetics of Serologic Responses to MERS Coronavirus Infection in Humans, South Korea
Table 1
Associations and p values for different clinical factors with time from illness onset to commencement of log phase of antibody response in PRNT50 and S1-ELISA*
Clinical factors | Acceleration factor of time from illness onset to log phase of antibody response |
||||
---|---|---|---|---|---|
PRNT50 titer | p value | S1-ELISA OD ratio‡ | p value | ||
Severe disease | 1.61 | <0.001 | 1.19 | 0.21 | |
Male sex† | 0.90 | 0.52 | 0.90 | 0.48 | |
Age >60 y† | 0.95 | 0.73 | 1.08 | 0.60 | |
Incubation period, d† | 0.97 | 0.06 | 0.95 | <0.001 | |
Use of corticosteroid† | 1.19 | 0.33 | 1.14 | 0.47 | |
Use of antiviral drugs† | 1.07 | 0.61 | 0.76 | 0.03 | |
Concomitant conditions† | 1.08 | 0.57 | 1.15 | 0.30 |
*Accelerated failure time models were used; acceleration factor >1 means a longer interval to commencement of antibody response. OD, optical density; PRNT50, 50% endpoint plaque reduction neutralization test.
†Effects were adjusted for severity.
‡Increase over S1-ELISA OD >0.8..
1These authors contributed equally to this article.