3. Daily levodopa dose (mean or median).
| Study ID | Length of follow up | N (MAO‐B inhibitor) | Dose (MAO‐B inhib) | N (control) | Dose (control) | Difference |
| US 1995 (bromocriptine arms) | 1 year | 22 | Mean 85 mg (SD 198) | 19 | Mean 117 mg (SD 173) | 32 mg/day |
| US 1995 (levodopa arms) | 1 year | 20 | Mean 382 mg (SD 155) | 21 | Mean 426 mg (SD 110) | 44 mg/day |
| Finland 1997 | About 3 years | 23 | Mean 358 mg (SD 117) | 21 | Mean 543 mg (SD 150) | 185 mg/day |
| SELEDO 1999 | About 3.5 years | 26 | Mean 338 mg | 20 | Mean 521 mg | 183 mg/day |
| UK‐PDRG 2001 | 4 years | Unknown | Median 375 mg | Unknown | Median 625 mg | 250 mg/day |
| Norway‐Denmark 1999 | 5 years | 38 | Mean 424 mg (SD 113) | 43 | Mean 506 mg (SD 184) | 82 mg/day |
| Swedish PSG 1998 | 7 years | 19 | Mean 529 mg (SD 145) | 28 | Mean 631 (SD 186) | 102 mg/day |
SD ‐ standard deviation