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. 2021 Jun 10;16(6):e0243676. doi: 10.1371/journal.pone.0243676

Table 2. Univariate analysis.

Characteristic Relative Risk 95% Confidence Interval P
Covid Status (Self-reported Previous Positive Test) 29.5 (14.3, 60.4) <0.0001
Contact History (Yes) 6.86 (3.04, 15.5) <0.0001
Club Sponsor 3.10 (1.22, 7.84) 0.0258
Symptom History (Yes) 2.31 (0.990, 5.42) 0.0577
BMI (Binary) 2.17 (0.884, 5.25) 0.0867
Was Working at school (in the summer) 0.196 (0.027, 1.45) 0.0979
Sports Coach 1.96 (0.591, 6.49) 0.225
Gender (Female) 0.616 (0.232, 1.64) 0.362
Mask Wearing (Yes) 0.721 (0.172, 3.03) 0.654
Age (Binary) 1.28 (0.559, 2.92) 0.667
Travel History (Yes) 0.744 (0.255, 2.17) 0.798
Elementary School ref -
Middle School 2.25 (0.813, 6.20) 0.117
High School 1.15 (0.357, 3.73) 1.00
Other School 1.10 (0.226, 5.35) 1.00
Blood Type (O+) ref -
Blood Type (B-) 3.28 (0.475, 22.6) 0.286
Blood Type (B+) 0.336 (0.044, 2.58) 0.468
Blood Type (A+) 0.758 (0.293, 1.96) 0.628
Blood Type (A-) 0.444 (0.058, 3.40) 0.696

AB+, AB-, and O- had no positive cases and therefore have no RR estimate.