Distribution of contact lens (CL) types among AK patients
| % CL types in population: Year: Sample size: | |||||
|---|---|---|---|---|---|
| AK cases CL use: (1 October 1997 to 30 September 1999) | 199717 | 199818 | 199919 | ||
| (n=93) | (n=1382) | (n=1947) | (n=1419) | Total (n=4748) | |
| *Daily disposable v other SCL schedules (excluding unknown): χ2 = 10.122, p = 0.00; †1–4 weekly disposal v other SCL schedules (excluding unknown): χ2 = 16.569, p = 0.00; ‡rigid CL v SCL (including unknown SCL schedules): χ2 = 2.064, p = 0.14. | |||||
| SCL: | |||||
| Daily disposable | 5 (5%)* | 12% | 23% | 24% | 954 (20%)* |
| Disposable 1–4 weeks | 46 (60%)† | 37% | 36% | 37% | 1737 (37%)† |
| Disposable >4 weeks | 15 (19%) | 34% | 24% | 19% | 1207 (25%) |
| Unknown disposable | 14 (15%) | 0% | 0% | 0% | 0 |
| Soft-rigid | 2 (2%) | 0% | 0% | 0% | 0 |
| Rigid CL | 11 (12%)‡ | 17% | 17% | 20% | 850 (18%)‡ |