Prognostic factors
To investigate the prognostic factors associated with treatment
response, we conducted a multivariable logistic analysis (Table 3).
Although none of variables showed a statistically significant
association with treatment response according to the univariate
analysis, the multivariable logistic model controlling for significant
covariables which had a p -value less than 0.15 in the univariate
model (duration of symptoms before admission, cough, nausea, and
hemoglobin), revealed that cough (OR, 0.02; 95% confidence interval,
0.01-0.40; p = 0.01) was an independent factor for predicting
treatment response.