Table 4.

Matrix of Spearman correlations and 2-tailed P values of age and answers to the three study measures.

Variable name		Age	Q1a	Q2b	Q3c
Age
	r	1.00	—d	—	—
	P value	<.001	—	—	—
Q1
	r	0.051	1.00	—	—
	P value	.35	<.001	—	—
Q2
	r	0.001	0.033	1.00	—
	P value	.99	.54	<.001	—
Q3
	r	–0.094	0.033	0.255	1.00
	P value	.09	.54	<.001	<.001

^aQ1: My impression is that the use of recreational drugs is a common phenomenon.

^bQ2: My impression is that young people do not have enough accessible information about the risks associated with drug use.

^cQ3: To what extent do you think your friends will use the proposed app?

^dNot applicable.