No change in disease onset was noted for female SOD1G93A mice (B), while a significant increase in onset of 19.0 days was seen in male SOD1G93A mice (A). However, no change was observed in disease duration, the time between disease onset and end-stage, in male (C) or female (D) SOD1G93A mice. AAV2 IGF-1 significantly increased survival in male SOD1G93A mice by 12.3 days compared to the AAV2 GFP group (E), while no effect was found in females (F).