Here is another article that I think is helpful that isn’t listed in their powerpoint presentation:
Effect of selective dorsal rhizotomy in the treatment of children with cerebral palsy – Engsberg et al 2006
I think the downfall of a lot of the literature is that it never specifies what “intensive” therapy is. It only vaguely references it and never fully defines it. I think what we can gather from some of the literature coming out about dosing and PT, intensive would be at least 3-5 times per week or longer sessions less times per week.
At my hospital our guidelines are that the child will participate in therapy for 24-36 months after their SDR. 4-5x/week for 6 months post SDR, 2-3x/week from 6-12 months post SDR, and 1-2x/week 12-36 months post SDR. A lot of our patients also receive inpatient rehab immediately after the surgery for 2-3 weeks. Of course (unfortunately) insurance ultimately dictates if our children can actually do all of this.