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Distribution of mtDNA haplogroups after stratification by AAO (LOPD vs. CT2)
| Haplogroup* | LOPD (n = 216) n (%) | CT2 (n = 392) n (%) |
|---|---|---|
| A | 12 (5.6) | 17 (4.3) |
| B | 41 (19.0) | 77 (19.6) |
| C | 7 (3.2) | 16 (4.1) |
| D | 29 (13.4) | 57 (14.5) |
| F | 33 (15.3) | 62 (15.8) |
| G | 8 (3.7) | 14 (3.6) |
| Others | 86 (39.8) | 149 (38.0) |
*Chi-square test for the overall haplogroup distribution: χ2 = 0.998, P = 0.986. mtDNA: Mitochondrial DNA; AAO: Age at onset; LOPD: Late- onset Parkinson’s disease; CT2: Control team 2.
