Table 2.
Number and timing of scans per time point by clinical group (Stable HC, N=210; Converter HC, N=17; Stable MCI, N=227; Converter MCI, N=166; AD, N=188).
| Time point | Stable HC | Converter HC | Stable MCI | Converter MCI | AD | Time from baseline |
|---|---|---|---|---|---|---|
| baseline | 210 | 17 | 227 | 166 | 188 | 0 |
| year 0.5 (month 6) | 197 | 17 | 194 | 161 | 166 | 0.58 ± 0.07 [0.21–0.94] |
| year 1 | 183 | 17 | 177 | 153 | 150 | 1.08 ± 0.07 [0.68–1.38] |
| year 1.5 | 0 | 0 | 153 | 136 | 0 | 1.59± 0.08 [1.26–1.92] |
| year 2 | 129 | 14 | 108 | 106 | 96 | 2.09 ± 0.10 [1.58–2.88] |
| year 3 | 115 | 6 | 68 | 70 | 0 | 3.09 ± 0.09 [2.52–3.45] |
| year 4 | 11 | 0 | 3 | 10 | 0 | 4.12 ± 0.09 [3.98–4.38] |
|
| ||||||
| Total | 845 | 71 | 930 | 802 | 600 | |
Time from baseline (in years) is in mean ± standard deviation; Ranges are listed in square brackets.