TABLE I: Comparisons between cases and controls.
|
|
KA (%) |
Controls (%) |
p |
|
N |
78 |
199 |
|
|
Sex |
|
|
|
|
Females |
36 (46.2%) |
94 (47.2%) |
>0.05 c2 |
|
Males |
42 (53.78%) |
105 (52.8%) |
|
|
Age (mean ± sd) in years |
67.1 ± 13.4 |
65.2 ± 11.8 |
>0.05 t test |
sd = standard deviation
TABLE II: Epidemiologic description of cases.
|
|
|
p |
|
Age at the diagnostic of KA (mean ± sd) in years |
64.9 ± 13.7 |
|
|
Female |
65.8 ± 13.2 |
>0.05 t test |
|
Male |
64.1 ± 14.2 |
|
|
Smokers |
65.6 ± 11.9 |
>0.05 t test |
|
Never smokers |
63.1 ± 17.3 |
|
|
Age when started smoking (mean ± sd) in years |
17.5 ± 8.8 |
|
|
Female |
18.5 ± 11.1 |
>0.05 t test |
|
Male |
17.0 ± 7.6 |
|
|
Diameter of the lesions (mean ± sd) in centimeters |
1.3 ± 0.9 |
>0.05 t test |
|
Smokers |
1.4 ± 1.0 |
|
|
Never smokers |
1.3 ± 0.5 |
|
|
Proportion of smokers |
54 (69.2%) |
|
|
Female |
20 (55.6%) |
<0.05 c2 |
|
Male |
34 (80.1%) |
|
sd = standard deviation
TABLE III: Topographical distribution of KA and relationship to gender.
|
|
Male |
% |
Female |
% |
N |
% |
p (Fisher) |
|
Upper arms |
21 |
26.9% |
14 |
17.9% |
35 |
44.8% |
>0.05 |
|
Head and neck |
17 |
21.8% |
12 |
15.4% |
29 |
37.2% |
>0.05 |
|
Legs |
2 |
2.6% |
8 |
10.3% |
10 |
12.9% |
<0.05 |
|
Trunk |
2 |
2.6% |
2 |
2.6% |
4 |
5.2% |
>0.05 |
|
Total |
42 |
53.8% |
36 |
46.2% |
78 |
100.0% |
|
TABLE IV: Association between smoking and KA.
|
|
KA |
Controls |
Total |
|
Smokers |
54 (69.2%) |
43 (21.6%) |
97 |
|
Never smokers |
24 (30.8%) |
156 (78.4%) |
180 |
|
Total |
78 |
199 |
277 |
Unadjusted Odds Ratio = 8.0 (CI 95% 4.6 to 14.0) p<0.01
Odds Ratio adjusted for sex and age = 9.1 (CI 95% 4.9 to 17.1) p<0.01 Multiple logistic regression.