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Comparison of mean OSDI score across study groups (N=110)
| Preservative | Ocular Surface Disease score Mean ± Std. Dev | Mean difference | 95% Confidence Interval for Mean | P value | |
|---|---|---|---|---|---|
| Lower Bound | Upper Bound | ||||
| Control (N=30) | 10.93 ± 7.36 | Baseline | |||
| Polyquad (N=40) | 12.45 ± 5.08 | 1.53 | -4.04 | 7.10 | 1.00 |
| BAK (N=40) | 29.09 ± 13.45 | 18.96 | 12.59 | 23.73 | <0.01 |
| Polyquad (N=40) | 12.45 ± 5.08 | Baseline | |||
| BAK (N=40) | 29.09 ± 13.45 | 16.63 | 11.47 | 21.79 | <0.01 |
