Table 2

 Odds ratio of early alcohol initiation, heavy alcohol consumption and regular illicit drug use in relation to school achievement and value-added education

School effect on early initiation to alcoholSchool effect on heavy alcohol consumptionSchool effect on regular illicit drug use
OR (95% CI)OR (95% CI)χ2; df; pOR (95% CI)OR (95% CI)χ2; df; pOR (95% CI)OR (95% CI)χ2; df; p
Achievement termsAcademic successTruancyAcademic successTruancyAcademic successTruancy
    Unadjusted0.94 (0.87 to 1.01)0.83 (0.73 to 0.94)8.0; 2; 0.020.93 (0.89 to 0.98)0.94 (0.87 to 1.02)9.0; 2; 0.010.95 (0.90 to 1.01)1.07 (0.98 to 1.18)13.2; 2; 0.001
    Adjusted0.94 (0.88 to 1.01)0.96 (0.85 to 1.08)3.2; 2; 0.200.93 (0.89 to 0.97)0.99 (0.92 to 1.07)13.8; 2; 0.0010.97 (0.92 to 1.03)1.06 (0.96 to 1.17)5.0; 2; 0.08
Value-added termsSchool cultureSchool cultureSchool culture
    Unadjusted0.83 (0.74 to 0.93)9.8; 1; 0.0020.91 (0.85 to 0.97)7.7; 1; 0.0050.90 (0.83 to 0.98)5.4; 1; 0.02
    Adjusted0.87 (0.78 to 0.95)8.6; 1; 0.0030.91 (0.85 to 0.96)9.7; 1; 0.0020.90 (0.82 to 0.98)6.1; 1; 0.01