Table 3: Gender, vitamin deficiency, and indoor smoking between dry eye and nondry eye groups.

Patient with nondry eyePatient with dry eyeChi test 𝑃

Males17639.090.003
Females1616
Smoking positive67049.53<0.0001
Smoking negative2610
Positive signs of vitamin deficiency7120.770.381
Negative signs of vitamin deficiency2568