From: Can air pollution affect tear film stability? a cross-sectional study in the aftermath of an explosion accident
Exposure group*
Men
Women
Number of participants
UI
83
66
EI
67
77
EW
184
42
Total
334
185
Age-mean (SD)
42 (12)
46 (13)
48 (17)
44 (14)
44 (12)
43 (11)
44 (13)
43 (13)
Present smokers (%)
28
18
31
34
36
32
25