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. 2020 May 3;20:175. doi: 10.1186/s12886-020-01447-4

Table 2.

Postoperative tear film time-course changes compared to preoperative values between study groups

Preoperative 1-Week 4-Weeks 12-Weeks Overall
P-value
Preop. Vs. 1 WK Preop. Vs. 4 WKs Preop. Vs. 12 WKs
Group-A
TBUT (Sec) 7.41 ± 2.48 4.94 ± 2.36 4.82 ± 1.94 5.59 ± 1.77 0.01 0.01 0.003 0.001
BST (mm) 14.71 ± 8.86 12.88 ± 8.05 13.53 ± 8.97 12.35 ± 8.20 0.88 0.39 0.62 0.16
Group-B
TBUT (Sec) 8.81 ± 5.59 6.38 ± 3.79 7.19 ± 6.45 4.50 ± 3.48 0.04 <  0.001 0.03 0.001
BST (mm) 16.13 ± 9.32 10.56 ± 5.16 10.63 ± 4.77 9.75 ± 6.57 0.05 0.04 0.18 0.05

TBUT Tear Break-up time test, Sec second, BST Basic Schirmer’s test, mm millimeters