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. 2020 Jun;66(6 Suppl):S89–S99. doi: 10.1016/j.jadohealth.2020.02.014

Table 2.

Model comparisons

Model
 a
 b
 c
 d
 e
 f
 g
Intense + problematic SMU fixed
 a + random slope intense SMU
 b + random slope problematic SMU
 c + intense SMU × country prevalence intense SMU
 d + intense SMU × country prevalence problematic SMU
 e + problematic SMU × country prevalence intense SMU
 f + problematic SMU × country prevalence problematic SMU
Free parameters 18 20 22 23 24 25 26
Mental well-being
 M1. Life satisfaction
 AIC 616143.1 616075.3 616026.6 616002.8 616004.8 616005.3 616004.8
 BIC 616322.2 616274.3 616245.6 616231.7 616243.6 616254.1 616263.6
 u1j .011 .010 .002 .002 .002 .002
 u2j .033∗∗ .034∗∗ .034∗∗ .031∗∗ .028∗∗
 M2. Psychological complaints
 AIC 430895.9 430807.2 430730.0 430723.3 430723.9 430724.2 430724.2
 BIC 431075.0 431006.3 430948.9 430952.2 430962.7 430973.0 430983.0
 u1j .005∗∗ .005∗∗ .003∗∗ .003∗∗ .003∗∗ .003∗∗
 u2j .013∗ .013∗ .013∗ .012∗ .011∗
School well-being
 M3. School satisfaction
 AIC 383871.5 383805.0 383745.5 383747.5 383747.2 383748.9 383750.8
 BIC 384050.7 384004.0 383964.4 383976.4 383986.0 383997.7 384009.5
 u1j .002∗∗ .002∗∗ .002∗∗ .002∗∗ .002∗∗ .002∗∗
 u2j .007∗∗ .007∗∗ .007∗∗ .007∗∗ .007∗∗
 M4. Perceived school pressure
 AIC 399668.6 399615.8 399546.0 399548.0 399549.6 399547.8 399549.3
 BIC 399847.7 399814.9 399764.9 399776.8 399788.4 399796.6 399808.0
 u1j .002∗ .002∗ .002∗ .002∗∗ .002∗∗ .002∗∗
 u2j .012 .012 .012 .010 .010
Social wellbeing
 M5. Family support
 AIC 597242.9 597185.1 597172.6 597159.2 597158.8 597160.7 597158.6
 BIC 597422.1 597384.1 597391.5 597388.1 597397.6 597409.5 597417.4
 u1j .009∗∗ .009∗∗ .004∗ .003∗ .003∗ .003∗
 u2j .012∗ .012∗ .012∗ .012∗ .009∗
 M6. Friend support
 AIC 597587.5 597504.2 597495.2 597485.3 597484.8 597486.7 597480.0
 BIC 597766.6 597703.2 597714.1 597714.1 597723.6 597735.5 597738.8
 u1j .012∗∗ .012∗∗ .007∗ .006 .006 .006
 u2j .009 .009 .009 .009 .006

Boldface AIC and BIC denote the lowest row values; Italics denote the models that were selected as final models for model interpretation.

SMU = social media use; u1j = slope variance intense SMU; u2j = slope variance problematic SMU.