Skip to main content

Table 3 Drug use at baseline: Comparison of means between treatment and control groups.

From: The NARCONON™ drug education curriculum for high school students: A non-randomized, controlled prevention trial

  Control Group N = 523 Drug Ed Group N = 435 Significance Level
Drug Use Variable Mean Mean t df p valuea
B1 Cigarettes (frequency) 1.38 1.45 -0.962 850 0.336
B2 Smokeless tobacco 1.38 1.34 0.634 951 0.526
B3 Cigarettes (amt. smoked) 1.51 1.62 -1.047 956 0.295
B4 Alcohol 1.64 1.51 1.611 955 0.107
B5 Being drunk 1.28 1.31 -0.408 866 0.684
B6 Marijuana 1.24 1.22 0.326 944 0.744
B7 Marijuana (amt. smoked) 1.19 1.21 -0.332 894 0.740
B8 Sniffed glue 1.11 1.11 0.132 876 0.895
B9 LSD 1.03 1.05 -0.672 802 0.502
B10 Amphetamines 1.07 1.13 -1.404 731 0.161
B11 Crack 1.05 1.07 -0.836 804 0.403
B12 Cocaine 1.06 1.07 -0.247 922 0.805
B13 Tranquiller 1.08 1.10 -0.513 790 0.608
B14 Barbiturates 1.08 1.10 -0.699 732 0.485
B15 Crystal Meth 1.04 1.07 -0.829 769 0.407
B16 Amphetamine w/o Rx 1.09 1.08 0.022 907 0.982
B17 Heroin 1.02 1.05 -1.078 654 0.281
B18 Other Narcotics 1.07 1.08 -0.257 866 0.798
B19 Ecstasy 1.07 1.06 0.463 904 0.644
B20 Roofies 1.02 1.06 -1.087 588 0.277
B21 GHB 1.02 1.04 -1.126 532 0.261
B22 Super K 1.02 1.05 -1.013 626 0.311
  1. aControlling for baseline differences by using an analysis of covariance with a Type III sums of squares, The t-test df is corrected for unequal variances.