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Table 2 Percentage of positive answers to question on antibiotic use against bacteria and other organisms.

From: Portuguese students' knowledge of antibiotics: a cross-sectional study of secondary school and university students in Braga

Options n Antibiotics are effective against bacteria only *
(%)
Antibiotics are effective against bacteria and other organisms (%) Antibiotics are effective against other organisms (%) P value
9 th grade 100 4 65 31  
12 th grade      
Sciences 39 28 46 26  
Humanities 7 14 14 72  
Informatics 19 0 74 26  
Arts 14 14 65 21  
Mean ± SD   14 ± 11.4 49.8 ± 26.5 36.3 ± 24 0.066
1 st year of university      
Biology/Geology 14 29 57 14  
Nursing 65 60 34 6  
Law 49 16 57 27  
Engineering 42 14 62 24  
Mean ± SD   29.8 ± 21.2 52.5 ± 12.6 17.8 ± 9.6 <0.001
  1. SD-Standard deviation, *- Correct answer