Table 4.

Means and standard deviations for the scales of the Strengths and Difficulties Questionnaire (SDQ)

SDQ	Rater	Age	Sex	N	Conduct problems	Hyperactivity	Peer problems	Emotion–anxiety	Prosocial
TEDS	Parent	4	Boy	3581	2.23 (1.58)	4.35 (2.34)	1.58 (1.51)	1.35 (1.39)	7.07 (1.85)
		4	Girl	3788	1.93 (1.49)	3.64 (2.20)	1.34 (1.41)	1.42 (1.47)	7.66 (1.77)
TEDS	Parent	7	Boy	2740	1.89 (1.73)	3.94 (2.61)	1.05 (1.46)	2.02 (1.74)	7.93 (1.84)
		7	Girl	2892	1.45 (1.47)	3.09 (2.35)	0.83 (1.23)	2.28 (1.82)	8.54 (1.55)
TEDS	Parent	9	Boy	1055	1.35 (1.43)	3.56 (2.45)	1.05 (1.56)	1.47 (1.67)	7.91 (1.85)
		9	Girl	1245	1.08 (1.30)	2.68 (2.08)	0.91 (1.33)	1.82 (1.88)	8.67 (1.48)
TEDS	Self	9	Boy	1055	2.39 (1.89)	4.13 (2.72)	1.93 (1.74)	2.99 (2.28)	7.39 (1.95)
		9	Girl	1245	1.92 (1.69)	3.43 (2.15)	1.76 (1.71)	3.38 (2.40)	8.38 (1.62)
TEDS	Parent	12	Boy	1828	1.42 (1.48)	3.33 (2.36)	1.18 (1.58)	1.67 (1.80)	8.25 (1.74)
		12	Girl	2117	1.16 (1.33)	2.28 (1.99)	0.93 (1.35)	1.90 (1.94)	8.86 (1.50)
TEDS	Self	12	Boy	1828	2.09 (1.48)	3.85 (2.33)	1.47 (1.63)	1.94 (1.93)	6.98 (1.96)
		12	Girls	2117	1.64 (1.50)	3.09 (2.16)	1.22 (1.48)	2.43 (2.10)	7.95 (1.69)
CATSS	Parent	15	Boys	2083	0.93 (1.21)	2.34 (2.23)	1.29 (1.66)	0.83 (1.34)	8.03 (1.85)
		15	Girls	2199	0.99 (1.30)	1.72 (1.93)	1.21 (1.61)	1.43 (1.76)	8.49 (1.80)
CATSS	Self	15	Boys	2258	1.78 (1.52)	3.42 (2.19)	1.79 (1.55)	2.00 (1.80)	7.37 (1.88)
		15	Girls	2806	1.73 (1.39)	3.42 (2.19)	1.79 (1.55)	2.00 (1.80)	7.37 (1.88)
TEDS	Parent	16	Boys	2134	1.26 (1.40)	2.58 (2.08)			7.92 (2.00)
		16	Girls	2632	1.18 (1.35)	1.93 (1.80)			8.50 (1.83)
TEDS	Self	16	Boys	2134	1.78 (1.52)	3.60 (2.32)	1.58 (1.46)	1.95 (1.86)	6.52 (1.97)
		16	Girls	2632	1.58 (1.44)	3.50 (2.28)	1.53 (1.46)	3.43 (3.32)	7.64 (1.77)