Table 4. Median Age at First Recorded NDC Diagnosis and Interquartile range (IQR) Among Those With and Without Care Experience.

	No care experience			Care experience		Mann-Whitney U	p-value
	Median age	IQR		Median age	IQR	statistic (W)
	at diagnosis			at diagnosis
ASD	10.3	6.6–12.8		7.4	4.0–11.1	679,974	<0.0001
Learning difficulties	6.8	5.8–8.3		6.3	5.0–7.8	23,590,746	<0.0001
Specific learning difficulties	9.0	7.2–11.3		8.3	6.6–11.1	3,830,403	0.0037
NDCs overall	7.1	5.9–9.0		6.3	4.9–7.9	38,701,034	<0.0001