Questions Pertain to the Following Table (Table 8), Which Presents

Questions pertain to the following table (Table 8) , which presents fictitious results regarding selected risk factors for perineal dermatitis among elderly residents of a nursing home.
$\begin{array}{c}\text { Table } 8\\\text { Risk Factors for Perineal Dermatitis (PD) in Nursing Home Residents }(N=10,000) \\\begin{array}{r}{\text { Odds Ratio }} \quad\quad\quad\\\begin{array}{|l|c|c|c|c|c|c|}\hline \text { Risk F actor } & \begin{array}{c}\text { Residents } \\\text { with PD } \\(\%) \\(n=700) \end{array} & \begin{array}{c}\text { Residents } \\\text { without PD } \\(\%) \\(n=9300) \end{array} & \begin{array}{c}\text { Test } \\\text { Value }\end{array} & p & \text { OR } & 95 \% \text { CI } \\\hline \text { Perfusion problems } & 35.0 \% & 30.0 \% & 7.92 & .008 & 1.09 & 1.04-1.37 \\\hline \text { Oxygenation problems } & 25.0 \% & 18.4 \% & 17.6 & <.001 & 1.18 & 1.05-1.43 \\\hline \text { Fever } & 6.2 \% & 3.5 \% & 12.4 & <.001 & 1.41 & 1.10-1.79 \\\hline \text { Urinary incontinence } & 12.0 \% & 10.0 \% & 2.48 & ? & .81 & 0.70-1.17 \\\hline\end{array}\end{array}\end{array}$
-Refer to Table 8. What were the degrees of freedom in these analyses?

A) 1
B) 2
C) 3
D) 4