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

Patient with nondry eye Patient with dry eye Chi test Males 17 63 9.09 0.003 Females 16 16 Smoking positive 6 70 49.53 <0.0001 Smoking negative 26 10 Positive signs of vitamin deficiency 7 12 0.77 0.381 Negative signs of vitamin deficiency 25 68