Table 1.

Mean (M) and standard deviation (SD) of SES T1 (socioeconomic status in childhood, at baseline), SES T3 (socioeconomic status in adolescence), internalizing problems (at T3), externalizing problems (at T3), total screen time (at T3) and physical inactivity (at T3) for male, female and the whole sample. See text for definitions and derivations.

Scale	Whole sample (N = 5958)	Male (N = 2899)	Female (N = 3059)
SES T1	M = .70 SD = .81	M = .70 SD = .82	M = .70 SD = .81
SES T3	M = .95 SD = 1.25	M = .96 SD = 1.29	M = .95 SD = 1.22
Internalizing problems	M = 9.10 SD = 6.79	M = 6.41 SD = 5.21	M = 11.64 SD = 7.12
Externalizing problems	M = 9.86 SD = 6.41	M = 8.93 SD = 6.05	M = 10.76 SD = 6.61
Total screen time	M = 3.79 SD = 2.94	M = 4.53 SD = 3.33	M = 3.09 SD = 2.29
Physical inactivity	M = .94 SD = .66	M = 0.89 SD = 0.67	M = 1.00 SD = .64