Table 4.
Descriptive statistics of the first break up time in both eyes in patients with and without Demodex infestation and results of the t-test with Cochran–Cox correction.
| Group | n | NIBUT (seconds) First break up time, both eyes |
t | df | p | ||||
|---|---|---|---|---|---|---|---|---|---|
| M ± SD | Variance | Median | Q25–Q75 | Min–max | |||||
| Demodex positive | 157 | 8.48 ± 4.36 | 19.03 | 7.46 | 4.78–11.57 | 1.91–24.00 | −11.63 | 309.7 | < 0.0001 |
| Demodex negative | 162 | 14.76 ± 5.26 | 27.64 | 14.48 | 10.71–17.79 | 4.21–24.00 | |||
Arithmetic mean (M), standard deviation (SD), interquantile range (Q25–Q75), degrees of freedom (df), t-value (t), p-value (p).