What nursing action reduces the risk of falling when a patient is getting into or out of a bathtub?

Using a skidproof disposable bath mat in front of the tub is a crucial nursing action that significantly reduces the risk of falls when a patient is getting into or out of a bathtub. The mat provides a stable, non-slip surface that enhances traction and helps prevent slippage, which is especially important in wet conditions typical of a bathroom environment.

In contrast, adding bath oil to the tub water introduces an additional risk of making the tub surface slippery, potentially increasing the likelihood of falls rather than reducing it. Placing an "Occupied" sign on the bathroom door does not directly impact the patient's physical safety regarding entering or exiting the tub, and filling the tub to a specific temperature or depth may be a comfort measure, but does not contribute to fall prevention. Therefore, ensuring that there is a skidproof mat effectively addresses the immediate hazard of slipping when navigating an oftentimes slippery area.