Table 4. Statistics for major bacteria in principal component analysis.
| Clone | Accessionnumber | Species | Percent contributions to | |
| Factor 1 | Factor 2 | |||
| 202H12 | AM420055 | Streptococcus pneumoniae* | 33.3 | 2.8 |
| 402G08 | AM420153 | Veillonella parvula oral clone* | 11.4 | 4.2 |
| 203003 | AM420056 | Prevotella genomosp. | 8.4 | 1.3 |
| 702F08 | AM420266 | Prevotella intermedia strain 2 | 7.2 | 20.4 |
| 302B03 | AM420081 | Prevotella intermedia strain C* | 3.7 | 14.9 |
| 101D05 | AM419962 | Peptostreptococcus stomatis* | 1.9 | 14.0 |
| Cumulative contribution to factors | 65.9 | 57.6 | ||
Species labelled * are significant in k-means clustering.