Table 1. Probabilities of disease-stage transition, according to National Alzheimer’s Coordinating Centre data [24].

Stage [25]	Staying	Improving by one	Worsening by one	Worsening by two
Mild	77.4%	–	15.8%	1.3%
Moderate	50.1%	7.0%	21.4%	–
Severe	49.2%	2.8%	–	–