Table 1.

Mean and standard deviations of study variables for total sample and by gender.

	Total		Boys	Girls	t-test
Variable	M (SD)	Rangea	M (SD)	M (SD)
Life events (6th)	2.30 (2.14)	0–14	2.52 (2.32)	2.07 (1.90)	2.25*
Control (6th)	44.11 (6.92)	18–54	43.93 (6.95)	44.29 (6.89)	−0.56
Contingency (6th)	37.20 (7.03)	13–54	37.46 (6.84)	36.92 (7.23)	0.81
Depressive symptoms (7th)	11.02 (7.66)	0–51	10.57 (6.82)	11.54 (8.50)	−1.39

Note. N = 456 for life events grade 6; N = 456 for control grade 6; N = 456 for contingency grade 6; N = 474 for depressive symptoms grade 7.

^aRefers to observed range.

*P < .05.