Table 5:
Multiple regression analysis of different factors.
BETA
𝑡
𝑃
-level
Age
−0.020
−0.285
0.777
BMI
0.059
0.811
0.422
Vitamine deficiency
−0.022
−0.314
0.755
Duration of smoking
−0.025
−0.219
0.827
Number of cigarettes per day
0.337
3.251
0.002
Cotinine
−0.119
−0.417
0.679
Cotinine/creatinine ratio
0.786
2.916
0.005
𝑅
=
0
.
9
0
9
,
𝑅
2
=
0
.
8
2
7
, Adjusted
𝑅
2
=
0
.
7
9
6
,
𝐹
=
2
6
.
6
3
8
,
𝑃
<
0
.
0
0
0
0
0
, sd. error of estimate: 0.469.
BMI: body mass index.