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0 0.5 1 1.5 2+ Case 18% Improvement Relative Risk Case (b) 29% c19early.org/c Behera et al. Vitamin C for COVID-19 Prophylaxis Does vitamin C reduce COVID-19 infections? Retrospective 215 patients in India Fewer cases with vitamin C (not stat. sig., p=0.58) Behera et al., PLoS ONE, doi:10.1371/journal.pone.0247163 Favors vitamin C Favors control

Role of ivermectin in the prevention of SARS-CoV-2 infection among healthcare workers in India: A matched case-control study

Behera et al., PLoS ONE, doi:10.1371/journal.pone.0247163 (date from earlier preprint)
Behera et al., Role of ivermectin in the prevention of SARS-CoV-2 infection among healthcare workers in India: A matched.., PLoS ONE, doi:10.1371/journal.pone.0247163 (date from earlier preprint)
Nov 2020   Source   PDF  
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Retrospective matched case-control prophylaxis study for HCQ, ivermectin, and vitamin C with 372 healthcare workers, showing lower COVID-19 incidence for all treatments, with statistical significance reached for ivermectin.
HCQ OR 0.56, p = 0.29
Ivermectin OR 0.27, p < 0.001
Vitamin C OR 0.82, p = 0.58
This is the 5th of 61 COVID-19 controlled studies for vitamin C, which collectively show efficacy with p=0.00000098. 15 studies are RCTs, which show efficacy with p=0.00013.
This study includes vitamin C, ivermectin, and HCQ.
risk of case, 18.0% lower, OR 0.82, p = 0.58, treatment 29 of 67 (43.3%) cases, 38 of 148 (25.7%) controls, adjusted per study, case control OR, model 2 conditional logistic regression.
risk of case, 29.0% lower, OR 0.71, p = 0.24, treatment 29 of 67 (43.3%) cases, 38 of 148 (25.7%) controls, adjusted per study, case control OR, matched pair analysis.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Behera et al., 3 Nov 2020, retrospective, India, peer-reviewed, 13 authors.
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Role of ivermectin in the prevention of SARS-CoV-2 infection among healthcare workers in India: A matched case-control study
Priyamadhaba Behera, Binod Kumar Patro, Arvind Kumar Singh, Pradnya Dilip Chandanshive, Ravikumar S. R., Somen Kumar Pradhan, Siva Santosh Kumar Pentapati, Gitanjali Batmanabane, Prasanta Raghab Mohapatra, Biswa Mohan Padhy, Shakti Kumar Bal, Sudipta Ranjan Singh, Rashmi Ranjan Mohanty
PLOS ONE, doi:10.1371/journal.pone.0247163
Background Ivermectin is one among several potential drugs explored for its therapeutic and preventive role in SARS-CoV-2 infection. The study was aimed to explore the association between ivermectin prophylaxis and the development of SARS-CoV-2 infection among healthcare workers. Methods A hospital-based matched case-control study was conducted among healthcare workers of AIIMS Bhubaneswar, India, from September to October 2020. Profession, gender, age and date of diagnosis were matched for 186 case-control pairs. Cases and controls were healthcare workers who tested positive and negative, respectively, for COVID-19 by RT-PCR. Exposure was defined as the intake of ivermectin and/or hydroxychloroquine and/or vitamin-C and/or other prophylaxis for COVID-19. Data collection and entry was done in Epicol-lect5, and analysis was performed using STATA version 13. Conditional logistic regression models were used to describe the associated factors for SARS-CoV-2 infection. Results Ivermectin prophylaxis was taken by 76 controls and 41 cases. Two-dose ivermectin prophylaxis (AOR 0.27, 95% CI, 0.15-0.51) was associated with a 73% reduction of SARS-CoV-2 infection among healthcare workers for the following month. Those involved in physical activity (AOR 3.06 95% CI, 1.18-7.93) for more than an hour/day were more likely to contract SARS-CoV-2 infection. Type of household, COVID duty, single-dose ivermectin
Supporting information S1 Appendix. Questionnaire used in the study (English and Odia language). (PDF) S1 Protocol. Study protocol. (DOC) Author Contributions
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