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Table 2 Distribution of predictor variables according to use of cannabis at T4

From: A longitudinal study of cannabis use increasing the use of asthma medication in young Norwegian adults

  Never used cannabis Has used cannabis before, but not last year Has used cannabis last year Difference test
Test statisticsa/p-value
Gender
 Men N (%) 682 60.7 247 22.0 194 17.3   
 Women N (%) 1024 72.2 271 19.1 123 8.7 52.03 < 0.001
Age Mean (SD) 28.56 2.01 28.46 1.88 28.07 1.91 8.34 < 0.001
Education (in years) Mean (SD) 14.92 2.14 15.03 2.20 15.05 2.26 0.75 0.471
Body mass index Mean (SD) 24.49 4.06 24.33 4.18 23.90 3.70 2.83 0.059
Asthma at T1
 No asthma N (%) 1530 67.0 462 20.2 292 12.8   
 Asthma N (%) 100 69.0 33 22.8 12 8.3 2.72 0.256
Allergies at T1
 No allergies N (%) 1290 67.4 394 20.6 231 12.1   
 Allergies N (%) 340 66.1 101 19.6 73 14.2 1.74 0.419
Smoking at T4
 Has never smoked N (%) 1132 81.9 175 12.7 75 5.4   
 Smoked daily before, but not now N (%) 208 56.4 121 32.8 40 10.8   
 Smokes sometimes, but not daily N (%) 135 48.4 72 25.8 72 25.8   
 Smokes daily N (%) 226 45.0 147 29.3 129 25.7 360.28 < 0.001
  1. aF-values for continous variables; χ2-values for categorical variables
  2. All data taken form the longitudinal Young in Norway Study