Variable

Category

A+

B+

A-ve

B-ve

AB+

AB-ve

O+

O-ve

Total

Previous donation

Yes

92

73

12

19

26

3

93

3

321

Never

73

101

8

10

21

6

60

4

283

Total

165

174

20

29

47

9

153

7

604

I gave an obligatory donation

Yes

19

15

4

6

7

2

7

1

61

No

81

104

8

10

19

6

69

4

301

I gave voluntary donation

Yes

35

25

4

5

9

0

19

1

98

No

136

149

16

24

38

9

134

6

512

171

174

20

29

47

9

153

7

610

Donation frequency

Each 3 months

15

7

2

1

5

2

8

0

40

Each 6 months

5

3

0

2

4

1

3

0

18

Once a year

15

8

2

2

4

0

6

0

38

infrequent

0

1

0

0

0

0

2

0

3

Total

35

19

4

5

13

3

19

0

99