Table 3
Mean follow-up in years by baseline Global Deterioration Scale score
GDS stage at baseline
n
Years of follow-up, mean (SD)
1
6
7.70 (3.88)
2
20
4.40 (1.98)
3
43
3.15 (2.27)
4
62
4.02 (3.09)
5
21
2.22 (2.48)
6
2
0.74 (0.42)
7
1
0.82 (–)