Table 1. Means and Post Hoc Tests for Differences in SDS Endorsement (range 1–6) for Demographic Variables.

Variables	Boys			Girls
	N	M	SD	n	M	SD
Age
16	28	2.79	0.94	43	2.91	0.66
17	43	3.06	0.94	58	2.78	0.71
18	49	3.00	0.87	54	2.87	0.81
19	42	3.01	0.80	60	2.77	0.70
20	48	2.93	0.73	40	2.61	0.59
Sexual experience
No	93	2.99	0.74	88	2.84	0.81
Yes	117	2.95	0.92	167	2.76	0.65
Ethnicity
Native Dutch	159	2.87a	0.82	178	2.78	0.66
Of other ethnicity	51	3.29a	0.85	77	2.82	0.80
Religious
No	134	2.86b	0.79	158	2.74	0.65
Yes	75	3.18b	0.92	96	2.87	0.79
Education
Low	142	2.98	0.88	180	2.82	0.73
Intermediate	50	2.95	0.85	52	2.70	0.65
High	18	2.97	0.53	23	2.78	0.68

Note. Different superscripts are indicative of group differences at the p < .01 level. Group differences were tested using ANOVA. Age was handled as a continuous variable in the hierarchical regression analysis, but age breakdown is presented in this table for transparency. Education level appears skewed because most of the participants were still young and in school and could not have obtained intermediate or high education level yet.