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.