Donepezil and nursing home effects on life expectancy in AD. NH = nursing home, AD = AD = Alzheimer’s disease. The vertical line indicates life expectancy (months). From the left to right, DNP + NH group, non-DNP + NH group, DNP + non-NH group, and non-DNP + non-NH group. There were significant effects of the drug (F = 14.105; p < 0.001) and nursing home residency (F = 17.326, p < 0.001) without significant interactions (F = 0.894, p = 0.347). No other covariates reached a significant level (age: F = 0.206, p = 0.651; gender: F = 0.796, p = 0.375; CVD: F = 2.911, p = 0.091; typical antipsychotic drugs: F = 0.035, p = 0.852; atypical antipsychotic drugs: F = 0.362, p = 0.549).