Table 5. ETS Differences Basedon Age Group.
| Age group, y | < 20 (n = 13) | 20-30 (n = 288) | > 30 (n = 136) | P value |
|---|---|---|---|---|
| ETs, mm, Mean ± SD | ||||
| ETs (1st measurement) | 9.55±1.22 | 9.81±74 | 9.76±90 | 0.54 |
| ETs (2nd measurement) | 9.50±1.49 | 10.21±1.10 | 9.99±1.31 | 0.06 |
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