GBA1 and Parkinson disease: <b>Results:</b> Among genotyped PD patients, <i>LRRK2</i> carriers constituted 13.7% (190/1390; 170 <i>G2019S</i>, 18 <i>R1441G/C/H</i>), <i>GBA1</i> 8.6% (119/1390; 96 <i>N409S</i>, 23 severe), and <i>SNCA</i> 2.0% (28/1390; all <i>A53T</i>).