Table 1.

Preoperative values (mean ± standard deviation) and range of variables with respect to dry eye

Diagnostic tests	Group 1	Group 2	P-value
Ocular Surface Disease Index	6.94±9.29 (0–25), N=6	7.08±12.24 (0–33.3), N=7	0.98*
SANDE (symptom frequency)	1.92±2.11 (0–6), N=6	0.71±0.76 (0–2), N=7	0.184*
SANDE (severity)	1.25±1.47 (0–4), N=6	0.29±0.49 (0–1), N=7	0.13*
Osmolarity	302.4±13.59 (277–325), N=12	310.14±14.78 (288–342), N=14	0.18*
Lissamine green staining (van Bijsterveld)	1.25±1.06 (0–3), N=12	0.69±0.75 (0–2), N=14	0.18**
Lissamine green staining (Oxford)	0.5±0.52 (0–1), N=12	0.43±0.51 (0–1), N=14	0.74**
Fluorescein staining (National Eye Institute/Industry Workshop)	0.08±0.29 (0–1), N=12	0.07±0.27 (0–1), N=14	0.96**
Tear breakup time	13.83±6.01 (7–25), N=12	11.11±6.63 (5.5–26), N=14	0.29*
Schirmer with anesthesia	16±5.16 (10–25), N=12	15.36±1.34 (15–20), N=14	0.66*

Notes:

^*Student’s t-test;

^**Mann–Whitney U-test; P<0.05. Data shown as mean ± standard deviation (range).

Abbreviation: SANDE, Symptom Assessment in Dry Eye.