Among the 29 athletes who received positive test results during days 11–14, 26 (89.7%) had not been tested previously during their quarantine period.Ī positive SARS-CoV-2 test result was received by one quarter of quarantined athletes during June–October 2020. Among those whose test results remained negative at day 5, the estimated probability of having a positive test result was 26.9% (95% CI = 23.7–30.7) after day 5, 14.2% (95% CI = 11.7–17.2) after day 7, and 4.7% (95% CI = 3.3–6.7) after day 10. The median interval between the start of quarantine and collection of a positive specimen was 2 days (range = 0–14 days). Among all SARS-CoV-2 RT-PCR tests administered, the positivity rate decreased over the quarantine period ( Figure 2). 9%) ( Figure 1) and by day 5 for 453 (73.1%) with a mean of 3.8 days from quarantine start (range 0–14 days) until the positive test (Supplementary Figure, ). Among the 620 athletes with positive test results, the positive test results occurred by day 2 of quarantine for 303 (48. Among these athletes, 302 (48.7%) reported symptoms before collection of the specimen that returned positive the mean interval from symptom onset to positive specimen collection date was 1.1 days (range = 0–12 days). Among 436 (73.4%) of these athletes with available exposure date, quarantine commenced a mean of 1.1 days after reported exposure (range = 0–11 days). Therefore, a total of 620 athletes with positive SARS-CoV-2 test results during quarantine were included in a time-to-event analysis. Three colleges and universities contributed data only on quarantined athletes who received positive test results during quarantine (193) after exclusion of 31 who did not meet inclusion criteria, 162 athletes remained. Among 386 quarantined athletes who became symptomatic, 321 (83.2%) ever received a positive test result.
A total of 458 (25.0%) quarantined athletes ever received a positive test result, including 137 (29.9%) who never reported symptoms. Athletes received a total of 3,345 RT-PCR tests (mean = 1.8 per athlete, range = 1–14) while in quarantine. The most commonly reported exposures were at social gatherings (40.7%, 745) or from roommates (31.7%, 580) overall, 232 (12.7%) quarantined athletes reported exposure associated with athletic activities. Among the remaining 1,830 quarantined athletes, the most common sports played were football (46.2%, 846), track and field or cross-country (10.4%, 190), and soccer (6.6%, 121) ( Table).
Twenty-four colleges and universities contributed data on 2,257 quarantined athletes, irrespective of test result data from 427 athletes were excluded based on the described exclusion criteria. Kaplan-Meier survival analysis estimated the probability and 95% confidence intervals (CIs) of athletes receiving a first positive SARS-CoV-2 RT-PCR test result after days 5, 7, and 10 of quarantine. Among athletes who had not received a positive test result by quarantine day 5, the probability of having a positive test result decreased from 27% after day 5 to 14 days after commencing quarantine. Among 1,830 quarantined athletes, 458 (25%) received positive reverse transcription–polymerase chain reaction (RT-PCR) test results during the 14-day quarantine, with a mean of 3.8 days from quarantine start (range = 0–14 days) until the positive test result. Despite the potential risk for transmission from frequent, close contact associated with athletic activities ( 4), more athletes reported exposure to COVID-19 at social gatherings (40.7%) and from roommates (31.7%) than they did from exposures associated with athletic activities (12.7%). Data on quarantined athletes participating in NCAA sports were used to characterize COVID-19 exposures and assess the amount of time between quarantine start and first positive SARS-CoV-2 test result. To improve compliance with quarantine and reduce the personal and economic burden of quarantine adherence, the quarantine period has been reduced in several countries from 14 days to as few as 5 days with testing ( 2) or 10 days without testing ( 3). Regional athletic conferences created testing and quarantine policies based on National Collegiate Athletic Association (NCAA) guidance ( 1) testing policies varied by conference, school, and sport. Mitigation measures included physical distancing, universal masking, and maximizing outdoor activity during training routine testing 10-day isolation of persons with COVID-19 and 14-day quarantine of athletes identified as close contacts* of persons with confirmed COVID-19. To safely resume sports, college and university athletic programs and regional athletic conferences created plans to mitigate transmission of SARS-CoV-2, the virus that causes coronavirus disease 2019 (COVID-19).
0 kommentar(er)
