SE

Negative

Positive

Device Failure Condition

Variable

Percentage

Count

Percentage

Count

P = 0.72

100%

12

0

0

Aged less than 55 years

Age

100%

2

0

0

56 - 65

92.9%

13

7.1%

1

66 - 75

90.5%

19

9.5%

2

76 - 85

100%

8

0

0

More than 85 years

P = 0.11

100%

29

0

0

Male

Gender

89.3%

25

10.7%

3

Female

P = 0.85

93.3%

14

6.7%

1

A1

AO/OTA

96.4%

27

3.6%

1

A2

92.9%

13

7.1%

1

A3

P = 0.06

100%

15

0

0

A

Dorr

100%

21

0

0

B

85.7%

18

14.3%

3

C

P = 0.54

92.5%

37

7.5%

3

Low Energy

Mechanism

Percentage

Count

Percentage

Count

High Energy