Table 1.

Summary of findings for sex differences

Core symptoms	Figure	Sample	Number of studies	Total n	Measure	z-Value	95% CI
Inattention	2	Total	48	14 601	All +	−1.37	−0.2	0.04
Hyperactivity/impulsivity	3	Total	43	12 874	All +	−2.50*	−0.27	−0.03
Combined symptoms	4	Total	19	7272	All +	−0.21	−0.17	0.14
Inattention	5	Child	12	3978	Rating scale	−1.88	−0.052	0.01
Hyperactivity/impulsivity	7	Child	12	3917	Rating scale	−4.62***	−0.51	−0.21
Combined symptoms	9	Child	5	1639	Rating scale	−1.20	−0.43	0.1
Inattention	6	Adult	4	1587	Rating scale	−3.25**	−0.28	−0.07
Hyperactivity/impulsivity	8	Adult	3	1042	Rating scale	0.85	−0.3	0.76
Combined symptoms	10	Adult	3	1042	Rating scale	0.64	−0.39	0.76
Inattention	11	Child	23	4907	Clinical interview	−0.10	−0.18	0.16
Hyperactivity/impulsivity	13	Child	22	4626	Clinical interview	−0.82	−0.32	0.13
Combined symptoms	15	Child	6	1272	Clinical interview	0.47	−0.11	0.19
Inattention	12	Adult	9	2371	Clinical interview	0.18	−0.27	0.23
Hyperactivity/impulsivity	14	Adult	8	2175	Clinical interview	−1.20	−0.14	0.03
Combined symptoms	16	Adult	4	1468	Clinical interview	0.8	−0.21	0.51