Table 1.
Univariate analysis of the demographic and clinical characteristics between the subjects of two age groups.
Fig 1.
The plot of the fitted multiple generalized additive model (GAM) for estimating the partial effect of “Age” (years) on the “change score of the Lawton IADL scale”, adjusted for the effects of the “Problem solving score of the CDR” and the smoothed “MMSE score”.
The change score of the Lawton IADL scale = The current score of the Lawton IADL scale − The Lawton IADL scale at baseline. Lawton IADL scale = Lawton Instrument Activities of Daily Living scale; CDR = Clinical Dementia Rating scale; and MMSE = Mini-Mental State Examination. The cut-off value of 81.2 years for “Age” was estimated by the intersection of the smoothed red curve and the green straight line at Predicted value of Y = 0. The many little vertical bars (called the rugs) right above the X-axis indicated where the observed values of “Age” located. The technical details of the GAM plot were described in the Materials and methods section.
Table 2.
Multivariate analysis of the predictors for the change scorea of the Lawton IADL scale by fitting multiple linear regression model with the stepwise variable selection procedure.
Table 3.
Univariate analysis of the basic and instrumental activities of daily living functions among the subjects of NC, MCI, and dementia.
Table 4.
Univariate analysis of the basic and instrumental activities of daily living functions among the subjects with mild, moderate, and severe dementia respectively.