Figure 3

Changes in LTCB grades stratified by Time and Age. As time progressed (upper left), the LTCB grades decreased, but statistical significance was observed only for disability. The shaded area represents a pointwise confidence band for the fitted values. LTCB grades increased with age (upper right). The confidence intervals in random variables (patient individuals: middle, hospitals: lower) are shown. Some specified hospitals (lower) are below or above zero.