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Evaluation of tear stability in smokers and non-smokers
| NIBUT | TBUT | |||
|---|---|---|---|---|
| Mean±SD (s) | Median (minimum, maximum) (s) | Mean±SD (s) | Median (minimum, maximum) (s) | |
| Smokers | 7.29±1.18 | 7.44 (4.87, 9.54) | 3.24±1.05 | 3.46 (1.34, 5.46) |
| Non-smokers | 13.26±3.72 | 13.29 (7.61, 21.33) | 5.51±1.44 | 5.89 (3.00, 9.26) |
| P | Mann-Whitney, U=38.5, Z=−5.987, P=0.0001 | t-test, P=0.0001 | ||
P<0.05 is considered statistically significant. NIBUT: Non-invasive tear break-up time, TBUT: Tear break-up time, SD: Standard deviation
