TABLE 2.

Participant Data Pre- and Post-Selective Dorsal Rhizotomy

	All	No hip surgery	Hip surgery
No. children (hips)	90 (180)	56 (112)	34 (68)
GMFCS levels (I/II/III/IV/V)	1/13/24/43/9	1/13/16/22/4	0/0/8/21/5
Age at SDR (y): mean (SD)	4.9 (1.5)	4.8 (1.3)	5.0 (1.8)
Pre-SDR
MP range (%)	0–100	0–64	9 – 100
MP (all hips): mean (SD)	28.7 (13.9)	25.1 (12.5)	34.5 (14.2)
Level I	12.5 (1.5)	12.5 (1.5)	NA
Level II	17.8 (10.1)	17.8 (10.1)	NA
Level III	30.1 (14.2)	26.5 (13.7)	37.3 (12.9)
Level IV	30.8 (11.5)	29.7 (11.2)	31.9 (11.8)
Level V	31.8 (20.4)	20.1 (9.6)	41.1 (22.2)
No. (%) children: hips MP >30%	47 (52): 72 (40)	21 (38): 35 (31)	26 (77): 37 (54)
Level I	0 (0): 0 (0)	0 (0): 0 (0)	0 (0): 0 (0)
Level II	2 (15): 3 (12)	2 (15): 3 (12)	0 (0): 0 (0)
Level III	13 (54): 20 (42)	6 (38): 9 (28)	7 (88): 11 (69)
Level IV	27 (63): 40 (47)	12 (55): 21 (48)	15 (71): 19 (45)
Level V	5 (56): 9 (50)	1 (25): 2 (25)	4 (80): 7 (70)
Post-SDR
Length of follow-up/time to hip surgery (y): mean (SD)	8.5 (5.1)	11.1 (4.3)	4.2 (3.2)
Range in follow-up time (y)	0.5–25.0	5.0–25.0	0.5–13.5
Age at follow-up (y): mean (SD)	13.4 (5.4)	16.0 (4.5)	9.2 (3.9)
MP at follow-up or prehip surgery: mean (SD)	33.7 (24.5)	27.3 (22.5)	44.4 (24.2)
Level I	13.5 (4.5)	13.5 (4.5)	NA
Level II	14.7 (8.1)	14.7 (8.1)	NA
Level III	33.2 (21.4)	27.7 (20.0)	44.3 (20.2)
Level IV	35.5 (23.4)	28.5 (19.4)	42.8 (25.5)
Level V	56.7 (32.4)	63.1 (40.2)	51.5 (25.6)
No. (%)children: hips MP >30%	50 (56): 70 (39)	19 (34): 26 (23)	31 (91): 44 (65)
Level I	0 (0): 0 (0)	0 (0): 0 (0)	0 (0): 0 (0)
Level II	1 (8): 1(4)	1 (8): 1(4)	0 (0): 0 (0)
Level III	11 (46): 16 (33)	4 (25): 7 (22)	7 (88): 9 (56)
Level IV	31 (72): 42 (49)	11 (50): 13 (30)	20 (95): 29 (69)
Level V	7 (78): 11 (61)	3 (75): 5 (63)	4 (80); 6 (60)

SDR indicates Selective dorsal rhizotomy; MP, Migration percentage; GMFCS, Gross Motor Function Classification System.