Table 3. Correlation coefficients between different biofilm signals.
| Growth condition | Serum (anaerobe) | Sucrose (anaerobe) | Sucrose (aerobe) | ||||
|---|---|---|---|---|---|---|---|
| Comparison | Correlation coefficient rs | B (95% CI) | Correlation coefficient rs | B (95% CI) | Correlation coefficient rs | B (95% CI) | |
| Saliva 1 | TB—GF | 0.755** | 0.218 (0.183–0.253) | 0.905** | 0.249 (0.239–0.260) | 0.920** | 0.259 (0.244–0.273) |
| TB—RF | 0.574** | 0.110 (0.084–0.137) | 0.744** | 0.052 (0.047–0.057) | 0.898** | 0.068 (0.063–0.074) | |
| GF—RF | 0.881** | 0.569 (0.534–0.605) | 0.863** | 0.211 (0.196–0.225) | 0.989** | 0.268 (0.260–0.276) | |
| Saliva 2 | TB—GF | 0.957** | 0.435 (0.386–0.484) | 0.936** | 0.264 (0.255–0.273) | 0.850** | 0.264 (0.253–0.278) |
| TB—RF | 0.900** | 0.183 (0.162–0.204) | 0.910** | 0.056 (0.052–0.059) | 0.807** | 0.059 (0.055–0.063) | |
| GF—RF | 0.954** | 0.418 (0.403–0.434) | 0.867** | 0.204 (0.188–0.221) | 0.972** | 0.224 (0.219–0.230) | |
| Saliva 3 | TB—GF | 0.762** | 0.418 (0.352–0.485) | 0.922** | 0.358 (0.342–0.374) | 0.983** | 0.267 (0.252–0.282) |
| TB—RF | 0.730** | 0.216 (0.177–0.254) | 0.873** | 0.091 (0.086–0.097) | 0.984** | 0.075 (0.069–0.080) | |
| GF—RF | 0.942** | 0.519 (0.486–0.551) | 0.967** | 0.256 (0.247–0.264) | 0.987** | 0.281 (0.272–0.290) | |
| Saliva 4 | TB—GF | 0.805** | 0.643 (0.421–0.864) | 0.903** | 0.228 (0.209–0.247) | 0.888** | 0.320 (0.293–0.347) |
| TB—RF | 0.507** | 0.120 (0.068–0.172) | 0.786** | 0.046 (0.039–0.053) | 0.826** | 0.072 (0.064–0.080) | |
| GF—RF | 0.847** | 0.212 (0.198–0.225) | 0.898** | 0.216 (0.203–0.228) | 0.976** | 0.231 (0.225–0.236) | |
| Saliva 5 | TB—GF | 0.679** | 0.232 (0.218–0.247) | 0.767** | 0.161 (0.139–0.183) | 0.924** | 0.267 (0.244–0.290) |
| TB—RF | 0.635** | 0.062 (0.056–0.068) | 0.757** | 0.027 (0.021–0.033) | 0.844** | 0.055 (0.048–0.062) | |
| GF—RF | 0.948** | 0.274 (0.262–0.287) | 0.958** | 0.190 (0.177–0.203) | 0.957** | 0.214 (0.206–0.222) | |
| Saliva 6 | TB—GF | 0.118 | 0.041 (-0.092–0.175) | 0.122 | 0.296 (0.048–0.545) | 0.837** | 0.197 (0.174–0.221) |
| TB—RF | -0.013 | 0.013 (-0.007–0.033) | -0.016 | 0.042 (-0.013–0.097) | 0.679** | 0.038 (0.029–0.046) | |
| GF—RF | 0.638** | 0.084 (0.054–0.114) | 0.933** | 0.212 (0.201–0.223) | 0.948** | 0.220 (0.204–0.237) | |
| Saliva 7 | TB—GF | 0.932** | 0.248 (0.236–0.259) | 0.887** | 0.256 (0.241–0.270) | 0.863** | 0.262 (0.246–0.278) |
| TB—RF | 0.897** | 0.052 (0.049–0.056) | 0.848** | 0.053 (0.049–0.057) | 0.834** | 0.053 (0.048–0.059) | |
| GF—RF | 0.966** | 0.210 (0.201–0.220) | 0.967** | 0.212 (0.206–0.218) | 0.966** | 0.211 (0.203–0.218 | |
| Saliva 8 | TB—GF | 0.985** | 0.330 (0.291–0.368) | 0.714** | 0.286 (0.265–0.308) | 0.780** | 0.115 (0.098–0.133) |
| TB—RF | 0.933** | 0.033 (0.029–0.036) | 0.692** | 0.071 (0.063–0.079) | 0.734** | 0.024 (0.016–0.031) | |
| GF—RF | 0.928** | 0.095 (0.090–0.101) | 0.983** | 0.259 (0.248–0.269) | 0.861** | 0.252 (0.216–0.287) | |
The Spearman rank correlations of the relative intensity of total biofilm (TB), green fluorescence (GF) and red fluorescence (RF). B is the regression coefficient of the linear regression with its 95% Confidence Interval.
** = Correlation is significant at the 0.01 level (2-tailed).