Table 4.
Comparison of the groups with >5 mm (normal) and ≤5 mm (abnormal) tear production.
| Characteristic | Category | >5 mm, n (%) | ≤5 mm, n (%) | P |
| Gender |
|
|
|
|
|
|
Male | 18 (75.0) | 6 (25.0) | .458a |
|
|
Female | 49 (65.3) | 26 (34.7) |
|
| Age group, years |
|
|
|
|
|
|
20–29 | 25 (86.2) | 4 (13.8) | .022b |
|
|
30–39 | 18 (72.0) | 7 (28.0) |
|
|
|
40–49 | 6 (42.9) | 8 (57.1) |
|
|
|
50–59 | 8 (53.3) | 7 (46.7) |
|
|
|
>60 | 10 (62.5) | 6 (37.5) |
|
| Duration of VDT use, mean hours (SD) |
|
5.9 (2.9) | 5.9 (3.2) | .821c |
| Contact lens use |
|
26 (38.8) | 14 (43.8) | .667a |
| Duration of contact lens use, mean hours (SD) |
|
12.6 (3.5) | 12.6 (2.7) | .978d |
| Smoking |
|
8 (11.2) | 2 (6.3) | .493a |
| Systemic disease |
|
10 (14.9) | 9 (28.2) | .171a |
aFisher’s exact test.
bChi-square test.
cWilcoxon rank-sum test.
d t test.