| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| hygiene hypothesis asthma | 1.31 | 0.7 | 4643 | 43 | 25 |
| hygiene | 1.6 | 0.4 | 255 | 31 | 7 |
| hypothesis | 0.9 | 1 | 3775 | 86 | 10 |
| asthma | 0.11 | 0.9 | 925 | 62 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| hygiene hypothesis asthma | 1.72 | 0.2 | 6375 | 39 |
| hygiene hypothesis and asthma | 0.54 | 0.7 | 3810 | 51 |
| asthma hygiene hypothesis | 1.96 | 0.8 | 1097 | 61 |
| causes and prevention of asthma | 1.46 | 0.1 | 1969 | 17 |
| air quality connection to asthma | 0.89 | 0.9 | 3224 | 21 |
| etiology of asthma pdf | 1.69 | 0.5 | 8438 | 8 |
| the history of asthma and genetics | 1.03 | 0.8 | 8388 | 60 |
| asthma and high humidity | 0.46 | 0.6 | 7584 | 17 |
| air quality and asthma | 1.03 | 0.4 | 2529 | 67 |
