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Comparison of risk factors for microbial keratitis among public and private patient cohorts using a Z test to compare proportional differences between two independent populations.
| % Public (n = 318) |
% Private (n = 210) |
Z-score | p-value | |
|---|---|---|---|---|
| Contact lens wear | 40.9 | 42.9 | 0.3 | >.05 |
| Ocular surface disease | 23.2 | 45.2 | 5.5 | <.001 |
| Trauma | 18.6 | 6.7 | −4.2 | <.001 |
| Steroid use | 4.3 | 10.0 | 2.6 | <.001 |
Note: some patients had multiple risk factors.
