Jul 26 2024 |
et al., Cannabis, doi:10.26828/cannabis/2024/000248 | Dried Cannabis Use, Tobacco Smoking, and COVID-19 Infection: Findings from a Longitudinal Observational Cohort Study |
| Longitudinal observational cohort study of 1,343 community adults in Canada, showing increased risk of self-reported COVID-19 infection with dried cannabis use. Cannabis users were younger than the control group. | ||
Mar 19 2024 |
et al., Vaccines, doi:10.3390/vaccines12030329 | Risk Factors for COVID-19 and Respiratory Tract Infections during the Coronavirus Pandemic |
| 134% more cases (p<0.0001). Retrospective 1,000 frontline healthcare workers in South Africa showing higher risk of COVID-19 for non-smokers. | ||
Nov 9 2023 |
et al., Diseases, doi:10.3390/diseases11040165 | Association of COVID-19 Infection with Sociodemographic, Anthropometric and Lifestyle Factors: A Cross-Sectional Study in an Older Adults’ Population Aged over 65 Years Old |
| 72% more cases (p=0.02). Retrospective 5,197 Greek adults over 65. After adjustment for confounders, COVID-19 infection was independently associated with poor sleep, low physical activity, low Mediterranean diet adherence, living in urban areas, smoking, obesity,.. | ||
Nov 7 2023 |
et al., Nutrients, doi:10.3390/nu16071037 | The Association between Lifestyle Factors and COVID-19: Findings from Qatar Biobank |
| 82% more cases (p<0.0001). Retrospective 10,000 adults in Qatar, showing lower risk of COVID-19 cases with smoking. Authors do not analyze COVID-19 severity. | ||
Feb 16 2023 |
et al., Journal of Neurology, doi:10.1007/s00415-023-11618-0 | Modifiable risk factors of COVID-19 in patients with multiple sclerosis: a single-centre case–control study |
| 270% more cases (p<0.0001). Case control analysis with 149 multiple sclerosis patients and 292 matched controls in Italy, showing lower risk of COVID-19 cases with smoking. | ||
Apr 13 2022 |
et al., medRxiv, doi:10.1101/2022.04.12.22273792 | Health behaviours the month prior to COVID-19 infection and the development of self-reported long COVID and specific long COVID symptoms: A longitudinal analysis of 1,811 UK adults |
| 37% lower long COVID (p=0.14). Retrospective 1,811 COVID-19 patients in the UK, showing lower risk of self-reported long COVID with no smoking in the month before infection, not reaching statistical significance (p=0.14). | ||
Oct 25 2021 |
et al., Nicotine & Tobacco Research, doi:10.1093/ntr/ntab223 | Smoking Status and Factors associated with COVID-19 In-Hospital Mortality among US Veterans |
| 3% lower mortality (p=0.8). Retrospective 10,074 hospitalized veterans with COVID-19 in the USA, showing higher risk of mortality for former smokers and no significant difference for current smokers. | ||
Jun 23 2020 |
et al., Nitric Oxide, doi:10.1016/j.niox.2020.06.005 | Nitric oxide dosed in short bursts at high concentrations may protect against Covid 19 |
| Hypothesis that reduced incidence of COVID-19 cases for smokers in some studies is due to bursts of high concentrations of nitric oxide during smoking. | ||
May 11 2020 |
et al., Nicotine & Tobacco Research, doi:10.1093/ntr/ntaa082 | Smoking Is Associated With COVID-19 Progression: A Meta-analysis |
| Meta analysis showing higher risk of progression for smokers among people with COVID-19. | ||