Table 4

Number and percentages of singletons and multiples by CP type

		Singletons	Multiples	Total
Spastic bilateral	N	3610	570	4180
Spastic bilateral	%	50.38	58.28	51.33
Spastic unilateral	N	2471	309	2780
Spastic unilateral	%	34.48	31.60	34.14
Other CP type	N	929	80	1009
Other CP type	%	12.96	8.18	12.39
CP type uncertain	N	156	19	175
CP type uncertain	%	2.18	1.94	2.15

Pearson χ²(3)=28.70, p<0.001.
CP, cerebral palsy.