Table 3.

Descriptive statistics for all study variables for females and males.

			Females		Males
Measures	Low	High	Mean	SD	Mean	SD
Age 12
Mother's education	1	8	3.60	1.13	3.74	1.13
Family conflict	1	4	2.01	0.73	2.04	0.76
Decision making	1	4	2.06	0.59	2.07	0.64
Difficulty making friends	1	7	2.58	1.30	2.82	1.40
Grade-point average	1	16	12.02	2.22	11.12	2.41
Skip school	0	12	0.55	1.75	0.96	2.42
College plan	2	3	2.70	0.42	2.76	0.43
Aggression	0	12	2.13	2.69	3.87	3.50
Bring alcohol or drug to school	0	12	0.07	0.71	0.43	1.91
Other problem behavior	0	12	0.83	1.40	1.4	2.09
Social ability	1	4	3.16	0.65	3.11	0.65
Importance of making friends	1	7	6.28	1.17	6.01	1.34
Time spent with friends	1	5	3.91	1.35	4.10	1.25
Importance of popularity	1	7	4.68	1.55	4.82	1.56
Sports value	1	7	5.16	1.70	5.86	1.48
Sport activity	1	4	2.74	1.14	3.35	0.99
Age 18
Family conflict	1	7	3.91	0.99	3.94	0.96
Decision making	1	4	3.23	0.59	3.83	0.66
Difficulty making friends	1	7	2.63	1.22	2.88	1.36
Grade-point average	0	4	2.79	0.79	2.58	0.78
Skip school	1	7	2.88	1.55	2.97	1.62
College plan	1	7	4.89	1.87	4.86	1.74
Aggression	1	7	1.18	0.36	1.69	0.84
Alcohol use	1	7	3.00	1.90	3.29	2.12
Other drug use	1	7	1.26	0.61	1.52	1.01
Social ability	1	7	5.65	1.16	5.50	1.31
Importance of making friends	1	7	5.66	1.32	5.53	1.35
Time spent with friends	1	8	5.40	1.79	5.66	1.75
Importance of popularity	1	7	4.25	1.29	4.84	1.22
Peer focus	1	7	2.90	1.07	3.44	1.06
Social efficacy	1	7	5.51	1.07	5.31	1.21
Sport values	1	7	3.88	1.93	5.34	1.71
Sport activity	1	8	2.38	1.64	3.40	1.89
Ages 21 and 28
General drinking 21	1	7	4.27	1.95	5.10	2.10
Heavy drinking 21	1	7	3.03	1.92	3.98	2.24
General drinking 28	1	7	4.43	1.93	5.31	1.93
Heavy drinking 28	1	7	2.25	1.46	3.20	2.00

SD = standard deviation.