| |
Reference (OR = 1)
|
Unadjusted
|
Model 1
|
Model 2
|
|---|
|
OR
|
95% CI
|
p
|
OR
|
95% CI
|
p
|
OR
|
95% CI
|
p
|
|---|
|
Female gender
|
Male
|
1.79
|
1.22–2.41
|
< 0.001
|
2.00
|
1.45–2.75
|
< 0.001
|
2.15
|
1.51–3.05
|
< 0.001
|
|
Age
|
Continuous
|
0.98
|
0.91–1.05
|
0.551
|
0.98
|
0.91–1.05
|
0.547
|
0.96
|
0.89–1.05
|
0.370
|
|
Education
|
Continuous
|
0.98
|
0.92–1.05
|
0.615
| | | |
0.97
|
0.90–1.05
|
0.442
|
|
Body mass index
|
Continuous
|
1.01
|
0.98–1.05
|
0.423
| | | |
1.04
|
1.00–1.08
|
0.050
|
|
Asthma at T1
|
No asthma
|
2.60
|
1.67–4.05
|
< 0.001
|
2.48
|
1.52–4.03
|
< 0.001
|
2.49
|
1.50–4.13
|
< 0.001
|
|
Allergies at T1
|
No allergies
|
1.58
|
1.15–2.17
|
0.005
|
1.38
|
0.98–1.95
|
0.067
|
1.51
|
1.05–2.17
|
0.025
|
|
Smoking at T4
|
Never smoked
| | | | | | | | | |
|
Smoked daily before, but not now
| |
1.47
|
0.99–2.18
|
0.054
| | | |
1.15
|
0.73–1.83
|
0.540
|
|
Smokes sometimes, but not daily
| |
1.01
|
0.61–1.66
|
0.976
| | | |
0.88
|
0.51–1.56
|
0.678
|
|
Smokes daily
| |
1.73
|
1.23–2.42
|
0.002
| | | |
1.20
|
0.78–1.85
|
0.414
|
|
Cannabis use at T4
|
Never used cannabis
| | | | | | | | | |
|
Used cannabis before, but not last year
| |
0.83
|
0.57–1.22
|
0.342
|
0.85
|
0.57–1.27
|
0.423
|
0.82
|
0.53–1.28
|
0.378
|
|
Used cannabis last year
| |
1.65
|
1.14–2.41
|
0.009
|
2.05
|
1.38–3.05
|
< 0.001
|
1.71
|
1.06–2.77
|
0.028
|
- Note: OR = odds ratio; 95% CI = 95% confidence interval of OR
- Data on prescriptions are taken from the Norwegian Prescription Database and and explanatory variables are taken from the longitudinal Young in Norway Study. Model 1 includes adjustment for gender, age, self-reported asthma or allergies in addition to cannabis smoking. Model 2 includes additional adjustment for education, BMI and smoking
