Table 1: Comparison between subjects who received payment and those who did not.

No payment Payment value
( )( )

Mean age (at 2000) 0.233 ( test)
Sex (M : F)8 : 549 : 1470.004 ( test)
CDR grade (1 : 2 : 3 at 2000)1 : 8 : 4 0.044 ( test)
MMSE score (at 2000) 0.601 ( test)
N-ADL score (at 2000) 0.141 ( test)