Parent-reported sleep problems, symptom ratings, and serum ferritin levels in children with attention-deficit/hyperactivity disorder: a case control study

Table 4 Conners’ Parent Rating Scale-Revised: Long Version (CPRS-R:L) subscales according to ferritin levels

	<30 ng/mL	≥30 ng/mL
	Mean ± SD	Mean ± SD	t	p
	(n = 25)	(n = 16)	t	p
CPRS-R:L subscales
Oppositional	21.2 ± 4.0	18.4 ± 5.9	1.761	0.086
Cognitive Problems/Inattention	26.6 ± 6.7	26.4 ± 5.5	0.132	0.896
Hyperactivity	18.6 ± 4.8	16.4 ± 4.4	1.530	0.134
ADHD index	26.7 ± 5.5	24.7 ± 4.3	1.250	0.219

ISSN: 1471-2431