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. 2021 Jul 7;12:623360. doi: 10.3389/fphar.2021.623360

TABLE 2.

Descriptive statistics and correlations (N = 585).

Variable N M SD 1 2 3 4 5
1. Age 585 33.21 6.97
2. Anxiety 585 2.38 0.41 −0.06
3. Loneliness 585 2.54 0.42 −0.12** 0.37***
4. Drug craving 585 2.43 0.74 0.07 0.28*** 0.16***
5. Depression 585 2.27 0.46 −0.07 0.51*** 0.49*** 0.39***

M = mean; SD = standard deviation.

*p < 0.05; **p < 0.01; ***p < 0.001.