## 3 Results
### Prediction of Incience of Pneumonia by Oral Bacterial-Specific Species
#### 3.4.2 Decision Analysis for the Prediction of Incidence of Pneumonia  
By using selected species, decision analysis was carried out to find out the rules to predict the fever after operation. The results were shown in Figure 2.  
To predict the incidence of pneumonia after operation, _Porphyromonas gingivalis_ and _Fusobacterium nucleation_ group at baseline can be a high risk, _Atopobium parvalum_ and _Enterococcus faecalis_ before a cancer operation can be a high risk.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & \multicolumn{4}{c}{**(a)**} \\ \hline
**Species** & **Cut Off (\%)** & **Sensitivity** & **Specificity** & **Likelihood Ratio** & **AUR** \\ \hline _AM420132\_s_ & 0.002 & 0.600 & 1.000 & - & 0.800 \\ \hline _Atopobium parvalum_ & 1.163 & 0.800 & 0.600 & 2.000 & 0.760 \\ \hline _CAGY\_s_ & 0.076 & 0.800 & 0.400 & 1.333 & 0.760 \\ \hline _Campylobacter gracilis_ & 0.002 & 0.800 & 0.800 & 4.000 & 0.800 \\ \hline _Dialister invisus_ & 0.019 & 1.000 & 0.800 & 5.000 & 0.920 \\ \hline _Dialister pneumosintes_ & 0.007 & 0.800 & 1.000 & - & 0.840 \\ \hline _Fusobacterium nucleatum group_ & 0.103 & 0.800 & 0.800 & 4.000 & 0.880 \\ \hline _Porphyromonas endodontalis_ & 0.010 & 0.800 & 0.800 & 4.000 & 0.780 \\ \hline _Porphyromonas gingivalis_ & 0.005 & 1.000 & 0.800 & 5.000 & 0.960 \\ \hline _Prevotella oris_ & 0.002 & 0.800 & 0.800 & 4.000 & 0.840 \\ \hline _Stuttleworthia statelles_ & 0.002 & 0.800 & 0.800 & 4.000 & 0.800 \\ \hline _Stretpococcus anginosus group_ & 0.003 & 1.000 & 0.800 & 5.000 & 0.960 \\ \hline _Tannerella forsythia_ & 0.008 & 0.600 & 1.000 & - & 0.760 \\ \hline \multicolumn{4}{c}{**(b)**} \\ \hline
**Species** & **Cut Off (\%)** & **Sensitivity** & **Specificity** & **Likelihood Ratio** & **AUR** \\ \hline _Actinomyces oris_ & 0.006 & 0.600 & 1.000 & - & 0.760 \\ \hline _Actinomyces\_uc_ & 0.111 & 0.800 & 0.800 & 4.000 & 0.840 \\ \hline _Atopobium parvalum_ & 1.365 & 0.800 & 1.000 & - & 0.920 \\ \hline _Bacteroides corpocola_ & 0.001 & 0.600 & 1.000 & - & 0.800 \\ \hline _Bifidobacterium longum group_ & 0.011 & 0.600 & 1.000 & - & 0.800 \\ \hline _CAGY\_s_ & 0.122 & 0.800 & 0.600 & 2.000 & 0.800 \\ \hline _Enterococcus faecalis_ & 0.004 & 0.800 & 0.800 & 4.000 & 0.780 \\ \hline _Fusobacterium nucleatum group_ & 0.078 & 0.800 & 0.800 & 4.000 & 0.800 \\ \hline _Prerotella denticola_ & 0.005 & 0.800 & 0.800 & 4.000 & 0.800 \\ \hline _Prevotella\_uc_ & 0.024 & 0.800 & 0.600 & 2.000 & 0.760 \\ \hline _Porphyromonas gingivalis_ & 0.007 & 0.800 & 0.800 & 4.000 & 0.860 \\ \hline _Prevotella oris_ & 0.007 & 0.600 & 1.000 & - & 0.760 \\ \hline _Stuttleworthia statelles_ & 0.001 & 0.600 & 1.000 & - & 0.800 \\ \hline _Slackia exigua_ & 0.004 & 0.600 & 1.000 & - & 0.760 \\ \hline _Stretpococcus anginosus group_ & 0.012 & 0.600 & 1.000 & - & 0.780 \\ \hline _Streplococcus mutans_ & 0.004 & 0.600 & 1.000 & - & 0.760 \\ \hline \hline \end{tabular}  
* Periodond pathogens and Enterobacteriaceaeae were included. Likelihood ratio was calculated by Sensitivity/(1-S Specificity). Likelihood ratio could not calculate when Specificity was 1. “-” indicated that specificity was 1.  
\end{table}
Table 1: Sensitivity and specificity of species levels of oral bacteria for the incidence of fever after operation; (**a**) Baseline; (**b**) Before cancer operation.