Table 4.

Numbers of displaced and total inserted screws

Disease	Apical screws		Terminal screws		Total screws		Convex side		Concave side
	Displaced	Inserted	Displaced	Inserted	Displaced	Inserted	Displaced	Inserted	Displaced	Inserted
AIS	15	27	28	74	43	101	20	52	23	49
CP	9	28	31	92	38	120	20	64	18	56
DMD	6	29	31	95	37	124	17	64	20	60
SMA	9	27	23	65	32	92	19	48	13	44
Polio	3	13	15	32	18	45	10	23	8	22
Total	42	124	128	358	168	482	86	251	82	231
p Value	0.705						0.775

AIS = adolescent idiopathic scoliosis; CP = cerebral palsy; DMD = Duchenne muscular dystrophy; SMA = spinal muscular atrophy; polio = poliomyelitis.