Table 3. NIBUT and TBUT values in the first, second and third measurement of the right eye in patients divided into two groups according to dry eye symptoms evaluated by Schein questionnaire.
| Dry eye group (n=31) |
Control group (n=19) |
t-value | p | |
|---|---|---|---|---|
| NIBUT 1st testing (s) | 9 (3-35) | 21 (4-43) | -4.17 | <0.001 |
| NIBUT 2nd testing (s) | 8 (2-30) | 22 (10-48) | -4.96 | <0.001 |
| NIBUT 3rd testing (s) | 9 (2-32) | 21 (3-50) | -4.37 | <0.001 |
| TBUT 1st testing (s) | 5 (2-28) | 10 (3-20) | -1.97 | 0.053 |
| TBUT 2nd testing (s) | 5 (2-24) | 8 (3-22) | -2.40 | 0.020 |
| TBUT 3rd testing (s) | 5 (2-27) | 10 (3-28) | -2.40 | 0.020 |
median (min-max) T-test df=48; NIBUT = noninvasive break-up time; TBUT = tear break-up time; s = second