## 3 Results  
The mean age of the decedents was 63.24 \(\pm\) 15.82 years with a range between 31-99 years, and 36 (67.92%) were males with an average age of 60.5 years, respectively. Seventeen (32.07%) were females with an average age of 69.06 years. One case had a history of type 1 diabetes mellitus (1.89%), 11 cases had a history of type 2 diabetes mellitus (20.75%), and 16 (30.19%) had a blood alcohol level ranging from 0.1-2.87 g/L. The BHB biomarker was determined from VH and CSF collected from the occipital site using the method B kit in all 53 cases included in the study. In 24 cases (45.28%), BHB was also determined from CSF collected from the lumbar site using the same method B and in 35 cases (66.03%) BHB was also determined from peripheral blood using the method A portable multifunctional monitoring system. There were no statistically significant differences between mean values obtained at different PMI (Table 1), and there was no correlation of BHB values with the PMI (\(p\) = 0.43). The BHB concentration in various fluids irrespective of the PMI is detailed in Table 2.  
According to the obtained BHB values and using the diagnostic thresholds, we identified 11 ketoacidosis cases using method A and 9 ketoacidosis cases using method B. All nine cases of ketoacidosis identified using method B (values above the threshold for both VH and CSF occ) were confirmed with the portable analyzer (method A). For the two cases of ketoacidosis identified only by method A, the values obtained using the MAK041 kit were at the diagnostic limit (0.42-0.47) (Table 3). BHB concentrations determined in VH and CSF occ using method B correlated with each other and with peripheral blood BHB concentration determined using method A (\(p\) < 0.05) (Table 4). CSF L BHB concentrations correlated the least with the other values. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Variable** & **PMI** & **No. of Cases** & **Mean** & **Std. Deviation** & **Minimum** & **Maximum** & \(p\) \\ \hline \multirow{8}{*}{BHB V VH} & 24 h & 36 & 0.39 & 0.12 & 0.13 & 0.57 & \multirow{8}{*}{0.86} \\  & 36 h & 7 & 0.39 & 0.14 & 0.23 & 0.57 & \multirow{8}{*}{0.86} \\  & 48 h & 8 & 0.36 & 0.09 & 0.23 & 0.46 & \multirow{8}{*}{0.86} \\  & 72 h & 2 & 0.35 & 0.07 & 0.30 & 0.40 & \\  & Total & 53 & 0.39 & 0.12 & 0.13 & 0.57 & \\ \hline \multirow{8}{*}{BHB CSF Occ} & 24 h & 36 & 0.35 & 0.13 & 0.10 & 0.55 & \multirow{8}{*}{0.71} \\  & 36 h & 7 & 0.36 & 0.15 & 0.17 & 0.55 & \\ \cline{1-1}  & 48 h & 8 & 0.29 & 0.13 & 0.15 & 0.45 & \multirow{8}{*}{0.71} \\  & 72 h & 2 & 0.31 & 0.06 & 0.27 & 0.35 & \\ \cline{1-1}  & Total & 53 & 0.34 & 0.13 & 0.10 & 0.55 & \\ \hline \multirow{8}{*}{BHB CSF L} & 24 h & 15 & 0.19 & 0.06 & 0.11 & 0.30 & \multirow{8}{*}{0.58} \\  & 36 h & 3 & 0.22 & 0.08 & 0.13 & 0.30 & \\ \cline{1-1}  & 48 h & 4 & 0.18 & 0.04 & 0.15 & 0.24 & \multirow{8}{*}{0.58} \\ \cline{1-1}  & 72 h & 2 & 0.24 & 0.02 & 0.22 & 0.26 & \\ \cline{1-1}  & Total & 24 & 0.19 & 0.06 & 0.11 & 0.30 & \\ \hline \multirow{8}{*}{BHB peripheral blood} & 24 h & 25 & 2.66 & 2.22 & 0.30 & 7.10 & \multirow{8}{*}{0.38} \\  & 36 h & 4 & 3.58 & 3.49 & 0.60 & 7.30 & \\ \cline{1-1} peripheral & 48 h & 4 & 1.33 & 0.63 & 0.70 & 2.20 & \multirow{8}{*}{0.38} \\ \cline{1-1} blood & 72 h & 2 & 0.85 & 0.07 & 0.80 & 0.90 & \\ \cline{1-1}  & Total & 35 & 2.51 & 2.25 & 0.30 & 7.30 & \\ \hline \end{tabular}
\end{table} 
Table 1: Comparison of BHB values by PMI.