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Table 2 Dry eye examination results from 2011 to 2013

From: Prevalence of Dry Eye Syndrome after a Three-Year Exposure to a Clean Room

    Year   
   2011 2012 2013 p-value
TFBUT sec 10.1 ± 5.1* 7.7 ± 4.4 7.0 ± 3.2 <0.01
Schirmer’s test I mm 14.1 ± 8.0 14.3 ± 7.4 14.7 ± 8.8 0.61
Corneal erosion grade 1 20 (5.7%) 36 (10.2%) 30 (8.5%) 0.24
  grade 2 1 (0.0%) 1 (0.0%) 2 (0.0%)  
McMonnies questionnaire score 4.5 ± 3.5 5.2 ± 3.6 6.9 ± 3.9* <0.01
Dry eye grade mean score 0.7* 0.8 0.8 <0.01
  1. Data were compared using a general linear model and post-hoc Tukey test. The total number of subjects is not 352 due to missing data. The number of participants of 2011 Mcmonnies questionnaire is 292. So, the number of 2011 dry eye grade are 292. Other data were all 352. ‘*’ indicates a significant difference in the post-hoc analysis. TFBUT, tear film break-up test.