Table 2:
Age, body mass index, and smoking parameters between children with dry eye compared to those without dry eye.
Parameter
Nondry eye group (32)
Dry eye group (80)
𝑡
𝑃
Mean
±
SD
Mean
±
SD
Age (years)
7.91
±
2.63
6
.
9
±
2
.
2
9
−1.35
0.19
Body mass index
2
3
.
3
0
±
2
.
9
9
2
3
.
0
9
±
3
.
7
4
−0.22
0.83
Number of cigarettes per day
0
.
6
5
2
±
2
.
5
5
1
7
.
7
0
±
1
4
.
1
9
5.40
<0.0001
Duration of smoking exposure (hours /day)
0
.
7
0
±
2
.
3
8
1
0
.
0
0
±
3
.
7
7
8.45
<0.0001
Urinary cotinine levels (
μ
g/L)
1
5
.
0
3
±
8
.
1
1
6
6
.
6
4
±
1
5
.
7
1
14.22
<0.0001
Urinary cotinine/creatinine ratio (ng/mg)
5
0
.
6
2
±
2
2
.
7
2
2
1
0
.
1
7
±
4
8
.
3
6
14.62
<0.0001