| Variable | Cannabis smoking OR (95% CI) | Tobacco smoking OR (95% CI) |
| RA950 apical slice (%) | 3.3 (1.8 to 4.8) | 0.1 (−1.4 to 1.6) |
| RA950 mean of 3 slices (%) | 2.4 (1.0 to 3.8) | −0.6 (−2.0 to 0.8) |
| FEV1/FVC (%) | –1.1 (–2.6 to 0. 1) | –2.5 (–4.0 to –1.1) |
| FEV1 (l) | –0.01 (–0.13 to 0.11) | –0.2 (–0.33 to –0.09) |
| sGaw (/s.kPa) | –0.12 (–0.21 to –0.03) | –0.08 (–0.17 to 0.01) |
| TLC (l) | 0.14 (–0.02 to 0.31) | –0.08 (–0.24 to 0.09) |
| RV (l) | 0.02 (–0.07 to 0.10) | 0.04 (–0.05 to 0.12) |
| FRC (l) | 0.11 (–0.04 to 0.26) | 0.04 (–0.11 to 0.19) |
| Tlco/Va (mmol/min/kPa/l) | –0.01 (–0.05 to 0.03) | –0.11 (–0.16 to –0.07) |
| MMEF (l/min) | –4.94 (–19.3 to 9.4) | –25.2 (–39.5 to –11.0) |
FEV1, forced expiratory volume in 1 s; FRC, functional residual capacity; FVC, forced vital capacity; MMEF, maximum mid-expiratory flow; RV, residual volume; sGaw, specific airways conductance; SVC, slow vital capacity; TLC, total lung capacity; Tlco/Va, carbon monoxide transfer coefficient.