Table 2. Prevalence of CCD across different age groups, stratified by clinical group.

Age category	Overall (n = 4051)			Epilepsy only (n = 286)			Control only (n = 3765)
	N	CCD +	CCD -	N	CCD +	CCD -	N	CCD +	CCD -
<4.0 years	439	0.5%	99.5%	48	4.2%	95.8%	391	0.0%	100.0%
4.1–6.0years	752	1.1%	98.9%	91	6.6%	93.4%	661	0.3%	99.7%
6.1–8.0years	805	0.7%	99.3%	76	2.6%	97.4%	729	0.5%	99.5%
8.1–10.0 years	809	0.1%	99.9%	44	0.0%	100.0%	765	0.1%	99.9%
10.1–12.0 years	607	1.0%	99.0%	19	5.3%	94.7%	588	0.9%	99.1%
12.1–14.0 years	428	2.3%	97.7%	6	0.0%	100.0%	422	2.4%	97.6%
>14.0 years	211	14.2%	85.8%	2	0.0%	100.0%	209	14.4%	85.6%