Table 4:
Correlations between score of dry eye with smoking parameters in dry eye group.
Dry eye score
𝑟
𝑃
Age
−0.21
𝑃
=
0
.
1
6
Body mass index
0.13
𝑃
=
0
.
3
9
Number of cigarettes per day
0.74
𝑃
<
0
.
0
0
0
1
Duration of smoking exposure
0.68
𝑃
<
0
.
0
0
0
1
Cotinine
0.84
𝑃
<
0
.
0
0
0
1
Cotinine/creatinine ratio
0.88
𝑃
<
0
.
0
0
0
1