A slatted base having a frame and a measuring device for detecting the deformation of a lying surface under the load of a person lying thereon, wherein the deformation is carried out by detecting the vertical deflection of slats, which are held on both sides in a slatted base with their free ends in a mounting body, on which the displaceable end of a vertically oriented lifting drive engages, which is supported with respect to a bottom-side base frame, wherein the mutual horizontal distances between the slats is adjustable and fixable.