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Table 1 Prevalence of sign/symptoms referable to COVID-19 in the different prevalence area

From: COVID-19 pandemic and dental hygienists in Italy: a questionnaire survey

High prevalence area Medium prevalence area Low prevalence area Prevalence on total sample
OF % OF % OF % OF %
No symptoms/signs  
 1186 50.62 665 28.38 492 21.00 2343 81.61
One symptom/sign  
 45 42.45 10 9.43 51 48.11 106 3.69
Two symptoms/signs  
 53 45.30 12 10.26 52 44.44 117 4.08
Three or more symptoms/signs  
 130 42.62 41 13.44 134 43.94 305 10.62
  1. χ2(6) = 149.01 p < 0.01 Effect size Cramer’s V = 0.16. Trend across categories of COVID19 prevalence areas z = 6.38 p < 0.01
  2. OF Observed frequency, % Percentage