Table 5.
Trends in any and frequent past year cannabis use by geographical location (n = 566,912).
| (T1) | (T2) | (T3) | |||
|---|---|---|---|---|---|
| Prop (95% CI) | Prop (95% CI) | Change | Prop (95% CI) | Change | |
| Any use | |||||
| Eastern Norway | 6.3 (6.1, 6.6) | 7.0 (6.9, 7.2) | > T1 | 8.8 (8.7, 9.0) | > T1, T2 |
| Southern Norway | 4.3 (3.7, 4.9) | 3.8 (3.5, 4.1) | – | 6.3 (6.0, 6.6) | > T1, T2 |
| Western Norway | 4.4 (4.2, 4.6) | 3.9 (3.7, 4.1) | < T1* | 6.3 (6.2, 6.5) | > T1, T2 |
| Central Norway | 5.0 (4.6, 5.3) | 4.5 (4.1, 4.8) | – | 5.6 (5.3, 6.0) | > T1, T2 |
| Northern Norway | 5.2 (4.8, 5.7) | 4.6 (4.3, 5.0) | – | 6.5 (6.2, 6.8) | > T1, T2 |
| Frequent use | |||||
| Eastern Norway | 1.2 (1.2, 1.3) | 1.6 (1.5, 1.7) | > T1 | 2.2 (2.1, 2.3) | > T1, T2 |
| Southern Norway | 0.9 (0.6, 1.1) | 0.8 (0.7, 1.0) | – | 1.6 (1.5, 1.8) | > T1, T2 |
| Western Norway | 0.9 (0.8, 1.0) | 0.9 (0.8, 1.0) | – | 1.5 (1.5, 1.6) | > T1, T2 |
| Central Norway | 1.2 (1.0, 1.4) | 0.9 (0.8, 1.0) | – | 1.3 (1.1, 1.4) | > T2* |
| Northern Norway | 1.0 (0.8, 1.2) | 1.0 (0.9, 1.2) | – | 1.4 (1.2, 1.5) | > T1*, T2* |
T1 = 2010/2013; T2 = 2014/2016; T3 = 2017/2019. Prop, proportions; CI, confidence interval.
“>” implies significant increase; “ < ” implies significant decrease; and “–” implies no change compared with previous time period(s).
All changes p < 0.001 unless specified by asterisk: p ≤ 0.01