participant

pain before

pain after

age

1

8

2

61

2

7

2

56

3

10

2

53

4

8

5

59

5

9

5

31

6

10

8.5

28

7

8

3

71

8

8

3

66

9

8

8

57

10

9

6

64

11

9

5

49

12

8

4

51

13

10

2

37

14

10

5

35

15

8

3

57

16

17

10

8

49

18

6

2

37

19

8

3

33

20

7

3

59

21

7

6

31