Table 2.

Dopamine related biochemical parameters expressed as Parkinson’s to normal ratios as derived via meta-analyses

Parameter	Mean Ratio	95%CI	p
Dopamine: Caudate	0.18	0.10, 0.30	< 0.0001
Dopamine: Putamen	0.04	0.02, 0.08	< 0.0001
SN Cells	0.29	0.22, 0.37	< 0.0001
VMAT2: Caudate	0.48	0.34, 0.69	< 0.0001
VMAT2: Putamen	0.22	0.17, 0.29	< 0.0001

^*p-value derived by random effects model of log transformed mean differences expressed on linear scale.