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Mean change in 5-year scaled cognitive test score.
| Test | Baseline | Year 5 | Mean changea | 95% CI | N | P-value^ |
|---|---|---|---|---|---|---|
| Digit span | 10.279 | 10.277 | −0.003 | −0.153 to 0.148 | 1174 | NS |
| Digit symbol | 8.995 | 8.080 | −0.92 | −1.086 to −0.745 | 1155 | <0.001 |
| Trails B | 8.703 | 8.226 | −0.48 | −0.622 to −0.331 | 1114 | <0.001 |
aChange is (Year 5 – baseline) scaled score, NS, not significant.
^P-value from T-test, compared to no change.
N = 1174 (Digit span), N = 1155 (Digit symbol), N = 1114 (Trails B).
