Table 4 Test–Retest (N = 43). Descriptive statistics of BUT (s), Intraclass Correlation Coefficient (ICC) between test and retest measures calculated with two-way mixed effects model, absolute agreement, mean measurement (*p < 0.05; **p < 0.01; ***p < 0.001), and p values of paired comparison between test and retest (Wilcoxon test).

From: Comparing automated and manual assessments of tear break-up time using different non-invasive devices and a fluorescein procedure

Procedure

Right eye

Left eye

Test (s)

Mean ± SD; Median

Retest (s)

Mean ± SD; Median

ICC and 95% confidence intervals

Comparison

(p value of Wilcoxon-test)

Test (s)

Mean ± SD; Median

Retest (s)

Mean ± SD; Median

ICC and 95% confidence intervals

Comparison

(p value of Wilcoxon test)

EasyTear View+

12.7 ± 9.6;

9.4

11.3 ± 7.1;

9.6

0.76*** (0.56–0.87)

P = 0.52

13.1 ± 10.4;

8.4

10.9 ± 7.7;

7.9

0.76*** (0.55–0.87)

P = 0.12

Polaris

13.0 ± 9.3;

10.2

12.7 ± 8.1;

9.5

0.37 (− 0.18–0.66)

P = 0.24

13.7 ± 10.7;

9.4

14.5 ± 10.7;

9.3

0.81*** (0.64–0.90)

P = 0.50

Sirius+

15.8 ± 9.5;

13.2

13.8 ± 8.1;

10.8

0.78*** (0.59–0.88)

P = 0.08

15.9 ± 9.7;

11.8

15.4 ± 9.1;

13.2

0.57** (0.56–0.87)

P = 0.90

fBUT

8.9 ± 6.0;

6.8

8.6 ± 6.2;

7.0

0.61** (0.28–0.79)

P = 0.38

9.4 ± 7.5;

6.7

7.8 ± 4.1;

6.3

0.55** (0.19–0.76)

P = 0.74

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