Table 5 Correlation analysis of filter usage based on particle size
From: Reduction by air purifier of particulate concentration during orthodontic procedures: a pilot study
No | Yes | % | Chi-square | Nagelkerke R Square | Omnibus test p-value | ||
|---|---|---|---|---|---|---|---|
Filter | No | 15 | 14 | 51,72 | 5.203 | 0.114 | 0.023 |
Yes | 9 | 20 | 68,96 | ||||
Overall Percentage | 60,34 |