Skip to main content

Table 2 Non-invasive break-up time (NIBUT) and self-reported break-up time (SBUT) measured in seconds among men and women (18-67 years) in three exposure groups related to an explosion causing environmental pollution

From: Can air pollution affect tear film stability? a cross-sectional study in the aftermath of an explosion accident

  Exposure group* Men
Mean (SD)
Median (range) Women
Mean (SD)
Median (range)
NIBUT          
  UI 43 (19) 32 (7-60) 42 (21) 52 (7-60)
  EI 44 (18) 48 (9-60) 37 (20) 32 (6-60)
  EW 36 (19) 30 (5-60)† 36 (19) 37 (4-60)
  Total 40 (19) 37 (5-60) 39 (20) 39 (5-60)
SBUT          
  UI 44 (21) 26 (4-60) 33 (22) 25 (4-60)
  EI 42 (21) 53 (4-60) 29 (21) 20 (6-60)
  EW 35 (22) 28 (4-60)† 31 (22) 21 (2-60)
  Total 38 (22) 39 (4-60) 31 (22) 21 (2-60)
  1. *UI = Unexposed inhabitants far from the explosion area
  2. *EI = Exposed inhabitants near the explosion area
  3. *EW = Exposed workers at the explosion area
  4. † Significant differences between workers and inhabitants near pollution and also between workers and inhabitants far from pollution, Wilcoxon-Mann-Whitney-test, with exact p-values; p = 0.001 for both comparisons.