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. 2016 Mar 31;11(3):e0152696. doi: 10.1371/journal.pone.0152696

Table 3. Ocular surface signs in the study and control groups.

Signs Study group (n = 70) Control group (n = 35) P-value*
VA 0.4 (0.1–0.9) 0.2 (0–0.3) 0.003Δ
IOP, mmHg 12.68±3.87 13.64±2.99 0.204
TFBUT, s 5 (4–6.25) 6 (4–8) 0.043Δ
Schirmer’s tear test, mm 8.50 (4.75–17.25) 7 (5–14) 0.405
Corneal staining 0 (0–1) 0 (0–0) 0.012Δ
Meibomian glandobstruction 2 (1–2) 2 (1–2) 0.105
DED 28 6 0.018Δ

VA: LogMAR visual acuity; IOP, intraocular pressure; TFBUT, tear film break-up time test; DED, dry eye disease.

Values are shown as the mean ± SD, the median (interquartile range) or the number of participants.

* P-values were derived from Student’s t-tests, Mann-Whitney U-tests or Chi-Square tests.

ΔStatistical significance (P < 0.05).