Table 1.

Characteristics of participants from the first wave of the present study (Tp1) that did (stayers) or did not (dropouts) take part in the follow-up study, as well as final sample characteristics at follow-up (Tp2)

Tp1Diff D–SaTp2 final sample (n = 207)Diff Tp2–Tp1b
Dropouts (n = 66)Stayers (n = 207)
Gender35 females122 females122 females
Age in years at MR scan47.3 (20.0)50.2 (16.5)−3.053.8 (16.5)3.6i
Years of educationc15.2 (2.7)15.9 (2.6)−0.73.3 (0.7)Not applicable
MMSEd29.3 (0.9)29.4 (0.7)−0.129.1 (1.0)−0.3i
CVLT II IRe54.6 (12.7)56.4 (11.7)−1.858.1 (11.0)1.7i
CVLT II SDRf11.7 (3.4)12.3 (2.9)−0.612.9 (2.9)0.6i
CVLT II DRg12.4 (3.2)12.8 (2.9)−0.413.1 (2.7)0.3
Full-scale intelligence quotienth110.5 (8.7)115.8 (8.6)−5.3i119.1 (9.8)3.3i
BDI3.6 (3.0)4.5 (3.9)−0.9Not applicableNot applicable
  • aComparison of dropouts and stayers at Tp1.

  • bObserved changes within the final sample from Tp1 to Tp2.

  • cAt Tp2, a categorical classification system on a four-point scale was introduced: 1, primary school (9 years); 2, high school (12 years); 3, bachelor's degree; 4, master's degree or higher.

  • dMaximum score, 30.

  • eCVLT II immediate recall; maximum score, 80.

  • fCVLT II short delay recall (5 min); maximum score, 16.

  • gCVLT II delayed recall (30 min); maximum score, 16.

  • hFour-component Wechsler Abbreviated Scale of Intelligence at Tp1 and two-component Wechsler Abbreviated Scale of Intelligence at Tp2.

  • ip < 0.01.