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Kruskal-Wallis H test results of association between diameter and pH.
| Contact lens material | pH | n | mean rank | χ2 | p value |
|---|---|---|---|---|---|
| etafilcon A | 6.2 | 3 | 2.00 | 11.699 | 0.039* |
| 6.6 | 3 | 7.00 | |||
| 7.0 | 3 | 8.50 | |||
| 7.4 | 3 | 14.50 | |||
| 7.8 | 3 | 13.50 | |||
| 8.2 | 3 | 11.50 | |||
| hilafilcon B | 6.2 | 3 | 8.00 | 8.04 | 0.154 |
| 6.6 | 3 | 9.17 | |||
| 7.0 | 3 | 10.50 | |||
| 7.4 | 3 | 5.50 | |||
| 7.8 | 3 | 8.00 | |||
| 8.2 | 3 | 15.83 |
*p < 0.05.
