Allocation of effect categories related to types of article and age groups and differentiated by source (NL and the UK newspaper articles combined)
| Categories | Positive | Neutral | Negative | Positive-to-negative ratio | p Value |
| NL newspapers | 65 | 66 | 93 | 0.69 | 0.116 |
| UK newspapers | 192 | 169 | 204 | 0.94 | |
| Scientific journals | 191 | 106 | 55 | 3.50 | <0.001 |
| NL and UK newspapers (mixed) | 257 | 235 | 297 | 0.86 | |
| Type of article | |||||
| Scientific journals | |||||
| Case study | 4 | 4 | 5 | 0.80 | <0.001 |
| Research | 144 | 49 | 17 | 8.47 | |
| Opinion | 39 | 49 | 33 | 1.18 | |
| Policy | 3 | 5 | 0 | 3.00 | |
| Newspapers* | |||||
| Interview | 69 | 30 | 16 | 4.31 | <0.001 |
| News report | 88 | 125 | 188 | 0.47 | |
| Science journalism | 38 | 30 | 52 | 0.73 | |
| Opinion | 60 | 43 | 29 | 2.07 | |
| Policy | 2 | 7 | 12 | 0.17 | |
| Age group | |||||
| Scientific journals | |||||
| Adults | 70 | 12 | 7 | 10.0 | <0.001 |
| Paediatric | 48 | 39 | 21 | 2.29 | |
| Both | 33 | 29 | 18 | 1.83 | |
| Unspecified | 40 | 26 | 9 | 4.44 | |
| Newspapers | |||||
| Adults | 176 | 145 | 120 | 1.47 | <0.001 |
| Paediatric | 18 | 20 | 84 | 0.21 | |
| Both | 22 | 33 | 43 | 0.51 | |
| Unspecified | 41 | 37 | 50 | 0.82 | |
↵* Statistically significant differences in effect distributions related to types of article were also observed in the UK newspaper articles (p<0.001) and in NL newspaper articles (p=0.011).
NL, the Netherlands.