Variable

category

Has foot ulcer

df

P-value

Yes

No

Age in years

>70

68

45

3

P = 0.037

X² = 8.464

60 - 70

39

58

50 - 60

27

28

40 - 50

17

15

Smoking status

Past smoker

46

27

2

P = 0.017

X² = 5.738

Never smoked

105

119

Number of years with diabetes

Less than 5 years

15

20

3

P = 0.003

X² = 13.722

6 - 10 years

33

44

11 - 15 years

46

55

Greater than 15 year

57

27