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Correlation coefficients for bilateral phenol red thread tests (PRTT), Schirmer tear tests (STT), and endodontic absorbent paper tear tests (EAPTT) in 60 rabbits
| Correlation coefficient |
||
| Pearson | Spearman | |
| PRTT and STT | 0.54 | 0.51 |
| PRTT and EAPTT | 0.18 | 0.08 |
| STT and EAPTT | 0.15 | 0.19 |
