Comparison of the two randomised groups.
| IVIg 3 days (n=21) | IVIg 6 days (n=18) | p Value1-150 | |
| At randomisation: | |||
| Men | 10 (48) | 12 (67) | 0.23 |
| Age (y) | 66 (51–72) | 63.5 (50–73) | 0.77 |
| Previous enteritis | 3 (14) | 2 (11) | 1.00 |
| Mechanical ventilation | 14 (67) | 6 (33) | 0.004 |
| Time from disease onset (days) | 7 (4–9) | 8 (3–11) | 0.80 |
| Outcome measures: | |||
| Improvement by 1 disability grade after 4 weeks | 4/18 (22) | 7/16 (44) | 0.27 |
| Mean improvement (SD) | 0.3 (1.1) | 0.8 (1.3) | 0.22 |
| Time to walking with assistance (days): | |||
| In the overall study group | 131 (51–210) | 84 (23–121) | 0.08 |
| In ventilated patients | 164 (54–332) | 86 (13–151) | 0.04 |
| Time to walking without aid (days) | 152 (110–193) | 97 (51–202) | 0.39 |
| Number of ventilated patients after randomisation | 3 (14) | 4 (22) | 0.68 |
| Duration of mechanical ventilation | 33 (19–84) | 28 (16–131) | 0.63 |
| Full muscle strength recovery after 1 year1-151 | 6/15 (40) | 11/16 (69) | 0.08 |
| One year mortality | 4 (19) | 2 (11) | 0.67 |