Figure 1
From: Serum gamma-glutamyltransferase activity and Parkinson’s disease risk in men and women
Probability of incident PD by GGT quartiles in men and women. Baseline serum GGT levels differentially predict PD development in men (a) and women (b). PD, Parkinson’s disease; GGT, gamma-glutamyltransferase, Q1, quartile 1; Q, quartile 2; Q3, quartile 3; Q4, quartile 4.
