IV problem of MANOVA

Hi everybody,

How can we know how many IVs can we put in MANOVA?

I have 1 DV with 3 groups, and as IV, the neuropsychological test (CERAD) scores with 10 subtests (MMSE, TMT, BNT, verbal fluency etc.). Of course these subtests are correlated with each other.

Do you think I should use seperate ANOVAs? Or wouldnt it be very complicated if I add these 10 IVs in MANOVA?

Thank you very much for all your comments,