Table 3.
Correlations among the ocular surface disease index, tear meniscus height, and non-invasive tear break-up time scores
| Test/Correlation | OSDI | TMH (OD) | TMH (OS) | NITBUT (OD) | NITBUT (OS) |
|---|---|---|---|---|---|
| OSDI | |||||
| r | 1 | ‒0.002 | 0.055 | ‒0.239 | 0.004 |
| P | — | 0.992 | 0.743 | 0.149 | 0.981 |
| TMH (OD) | |||||
| r | ‒0.002 | 1 | 0.577* | 0.092 | 0.151 |
| P | 0.992 | — | 0.001 | 0.581 | 0.364 |
| TMH (OS) | |||||
| r | 0.055 | 0.577* | 1 | 0.057 | 0.183 |
| P | 0.732 | 0.001 | — | 0.732 | 0.272 |
| NITBUT (OD) | |||||
| r | ‒0.239 | 0.092 | 0.057 | 1 | 0.610* |
| P | 0.144 | 0.581 | 0.732 | — | 0.001 |
| NITBUT (OS) | |||||
| r | 0.004 | 0.151 | 0.183 | 0.610* | 1 |
| P | 0.981 | 0.364 | 0.272 | 0.001 | — |
Note: *Correlation is significant at the 0.01 level (two-tailed).
Abbreviations: r, Spearman correlation coefficient; P, significance; OSDI, ocular surface disease index; TMH, tear meniscus height; NITBUT, non-invasive tear break-up time; OD, right eye; OS, left eye.