Case control study in China with 105 cases and 210 matched controls, showing COVID-19 cases associated with physical activity ≥5 times per week. Authors note that people may choose gyms for exercise in winter, leading to higher exposure risk.
risk of case, 105.0% higher, HR 2.05, p < 0.001, high activity levels 59 of 105 (56.2%) cases,
69 of 210 (32.9%) controls, case control OR, Cox proportional hazards.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Gao et al., 5 Nov 2020, retrospective, China, peer-reviewed, survey, median age 55.0, 11 authors, study period 10 February, 2020 - 1 March, 2020.