Table 1. Descriptive statistics of the RADS-SF items.

	Male (n = 1287)		Female (n = 1627)		13–15 years (n = 1265)		16–19 years (n = 1649)		Total (N = 2914)
Ordinal alpha	.89		.89		.88		.89		.90
Items	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
1	1.57	0.73	1.55	0.70	1.51	0.69	1.59	0.73	1.56	0.71
3	1.53	0.76	1.70	0.82	1.58	0.79	1.66	0.80	1.62	0.80
6	1.55	0.79	1.65	0.82	1.56	0.81	1.63	0.81	1.60	0.81
7	1.65	0.73	1.98	0.79	1.80	0.80	1.87	0.77	1.84	0.78
14	1.14	0.50	1.15	0.49	1.16	0.52	1.14	0.47	1.15	0.49
19	1.43	0.69	1.38	0.65	1.39	0.66	1.41	0.68	1.40	0.67
20	1.36	0.68	1.49	0.78	1.44	0.75	1.43	0.73	1.43	0.74
22	2.69	0.81	2.70	0.79	2.72	0.83	2.68	0.77	2.69	0.80
28	2.27	0.90	2.28	0.83	2.30	0.88	2.26	0.85	2.28	0.86
30	1.60	0.82	1.72	0.85	1.67	0.86	1.67	0.83	1.67	0.84

Note. SD = Standard Deviation.