Table 2

Means (SD) of age and education in the four groups of subjects

Group Age Education
LCB52.3  (17.84)8.53  (4.61)
RCB58 (17.2)9.5 (5.08)
ICA44.33 (19.44)10.16 (2.4)
C56.85 (17.08)8.92 (3.22)