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Table 4 Knowledge of public health professionals and parents about varicella zoster virus (VZV)

From: Negative attitude and low intention to vaccinate universally against varicella among public health professionals and parents in the Netherlands: two internet surveys

  Professionals (RPHS & CHC combined) Parents
  Medical doctors (N = 162) Nurses (N = 279) Total (N = 441)   (N = 491)
Questionnaire item N % N % N % p-value*,** N % p-value*,***
If you never have had varicella, you can not get herpes zostera           
 Right (correct answer) 102 63.4 91 32.7 193 44.0 <0.0001 30 6.1 <0.0001
 Wrong 50 31.1 124 44.6 174 39.6   218 44.4  
 Don’t know 9 5.6 63 22.7 72 16.4   243 49.5  
If the blisters have dried up, you are no longer infectiousa           
 Right (correct answer) 155 95.7 264 95.3 419 95.4 1.000 430 87.6 <0.0001
 Wrong 6 3.7 9 3.2 15 3.4   21 4.3  
 Don’t know 1 0.6 4 1.4 5 1.1   40 8.1  
In general, you will get varicella only once in your lifea           
 Right (correct answer) 145 90.1 220 79.4 365 83.3 0.004 401 81.7 0.546
 Wrong 14 8.7 55 19.9 69 15.8   69 14.1  
 Don’t know 2 1.2 2 0.7 4 0.9   21 4.3  
What percentage of the Dutch population has had varicella before the age of 12 years?a           
 50 % 3 1.9 15 5.4 18 4.1   92 18.7  
 75 % 42 26.1 129 46.6 171 39.0   252 51.3  
 95 % (correct answer) 114 70.8 133 48.0 247 56.4 <0.0001 147 29.9 <0.0001
 100 % 2 1.2 0 0.0 2 0.5   0 0.0  
How many people visit their general practitioner for varicella in the Netherlands each year?           
 1 in 5 4 2.5 11 4.0 15 3.4   66 13.4  
 1 in 50 20 12.6 68 24.5 88 20.1   160 32.6  
 1 in 500 (correct answer) 76 47.8 128 46.0 204 46.7 0.765 175 35.6 0.001
 1 in 5000 59 37.1 71 25.5 130 29.7   90 18.3  
How many people are being hospitalised for varicella or its complications in the Netherlands each year?           
 1 in 50 5 3.1 54 19.5 59 13.5   89 18.1  
 1 in 500 7 4.3 23 8.3 30 6.8   77 15.7  
 1 in 5000 27 16.8 59 21.3 86 19.6   139 28.3  
 1 in 50000 (correct answer) 122 75.8 141 50.9 263 60.0 <0.0001 186 37.9 <0.0001
How many people die due to varicella or its complications in the Netherlands each year?a           
 Less than 10 (correct answer) 142 88.2 237 85.6 379 86.5 0.471 344 70.1 <0.0001
 10–100 17 10.6 33 11.9 50 11.4   129 26.3  
 100–1000 1 0.6 2 0.7 3 0.7   13 2.6  
 More than 1000 1 0.6 5 1.8 6 1.4   5 1.0  
Knowledge score VZV**** (max. 5 points)        <0.0001    <0.0001
 Limited knowledge (0–2 points) 6 3.8 55 20.3 61 14.2   177 36.0  
 Moderate knowledge (3 points) 31 19.6 90 33.2 121 28.2   209 42.6  
 Good knowledge (4–5 points) 121 76.6 126 46.5 247 57.6   105 21.4  
  1. RPHS = regional public health service; CHC = child health clinic
  2. *Pearson’s χ2 or Fisher’s exact test; p-values in bold indicate results that are considered statistically significant after correction for multiple testing by the Benjamini–Hochberg method at a false discovery rate of 0.05
  3. **P-value for comparison of the proportion with a correct answer (with the exception of the knowledge score) between medical doctors and nurses
  4. ***P-value for comparison of the proportion with a correct answer (with the exception of the knowledge score) between professionals and parents
  5. ****Knowledge score VZV: sum of the 5 items above with an a where each correct answer was awarded with 1 point, a wrong or missing answer with 0 points