Table 7.
Pre- and Postoperative Tear Size on Magnetic Resonance Imaginga
| Mild Group (n = 23) | Moderate Group (n = 9) | Severe Group (n = 17) | P Value | |
|---|---|---|---|---|
| Coronal | ||||
| Preoperative tear size, mm | 20.6 ± 8.8 | 20.4 ± 11.3 | 18.3 ± 8.8 | .798 |
| Postoperative tear size, mm | 15.5 ± 7.6 | 18.7 ± 12.1 | 21.2 ± 8.2 | .138 |
| Tear size difference,b mm | 5.1 ± 8.6 | 1.8 ± 13.6 | –2.8 ± 13.4 | .106 |
| Tear size change,c increased/decreased/unchanged, n | 1/11/11 | 3/3/3 | 8/5/4 | .026d |
| Sagittal | ||||
| Preoperative tear size, mm | 20.3 ± 9.6 | 15.1 ± 7.1 | 16.8 ± 8.4 | .244 |
| Postoperative tear size, mm | 13.8 ± 7.9 | 17.7 ± 10.7 | 18.2 ± 8.5 | .228 |
| Tear size difference,b mm | 6.6 ± 8.7 | –2.6 ± 9.6 | –1.4 ± 13.5 | .032e |
| Tear size change,c increased/decreased/unchanged, n | 3/13/7 | 4/2/3 | 6/4/7 | .135 |
aData are presented as mean ± SD unless otherwise specified.
bDifference = preoperative tear size – postoperative tear size.
cIncreased, <–5 mm; decreased, >5 mm; and unchanged, –5 to 5 mm.
dStatistically significant between mild and severe groups.
eStatistically significant between mild and moderate groups.