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10.3389/fpubh.2021.654734

http://scihub22266oqcxt.onion/10.3389/fpubh.2021.654734
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suck abstract from ncbi


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pmid34026715      Front+Public+Health 2021 ; 9 (ä): 654734
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  • COVID-19 Surveillance in the Primary Health Care Population of Qatar: Experience of Prioritizing Timeliness Over Representativeness When Sampling the Population #MMPMID34026715
  • A/Qotba HA; Al Nuaimi AS; Al Mujalli H; Zainel AA; Khudadad H; Marji T; Veettil ST; Syed MA
  • Front Public Health 2021[]; 9 (ä): 654734 PMID34026715show ga
  • SARS-CoV2 a new emerging Corona Virus Disease in humans, which called for containment measures by many countries. The current paper aims to discuss the impact of two different sampling methodologies when executing a drive through COVID-19 survey on the quality of estimated disease burden measures. Secondary data analysis of a pilot cross-sectional survey targeting Qatar's primary health care registered population was done. Two groups with different sampling methods were compared for estimating COVID-19 point prevalence using molecular testing for nasopharyngeal swabs. The first group is a stratified random sample non-proportional to size (N = 260). A total of 16 population strata based on age group, gender, and nationality were sampled. The second group is the Open invitation group (N = 841). The results showed that the two groups were obviously and significantly different in age and nationality. Besides, reporting of COVID-19 symptoms was more frequent in the open invitation group (28.2%) than the random sample (16.2%). The open invitation group overestimated the symptomatic COVID-19 prevalence rate by more than four times, while it overestimated the asymptomatic COVID-19 cases by a small margin. The overall prevalence rate of active COVID-19 cases in the open invitation sample (13.3%) was almost double that of the random sample (6.9%). Furthermore, using population sampling weights reduced the prevalence rate to 0.8%. The lesson learned here is that it is wise to consider the magnitude of bias introduced in a surveillance system when relying on convenient sampling approaches in response to time constraints.
  • |*COVID-19[MESH]
  • |Cross-Sectional Studies[MESH]
  • |Humans[MESH]
  • |Primary Health Care[MESH]
  • |Qatar/epidemiology[MESH]
  • |RNA, Viral[MESH]


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