Table IV.

Comparison of demographics of children with and without complications.

	Complication	No complication	p-value*
Total number (%)	10 (23)	34 (77)
Sex, n Male Female	5 5	14 20	0.62
Age, mean (range)	7.4 (5 to 11.6)	8 (3.7 to 13.6)	0.46
Rods, n Dual Single	5 5	33 1	0.0001†
Aetiology, n Idiopathic NM Syndromic Congenital	4 1 4 1	16 12 5 1	0.17
Pre-operative Cobb angle Mean (range)	78 (57 to 103)	68 (30 to 97)	0.054
Previous surgery, n Previous revision No previous revision	8 2	8 26	0.001†

^*Paired t-test was used for comparing means. Chi squared test was used or comparing sex, rod configuration, aetiology, and risk of having a complication with previous revision surgery.

^†Statistically significant (p < 0.05).