Table 2 Observer assessment of errors, difficulties and steps requiring assistance

Observed errors at each step

 Pre-testing

  1. Opening the package

0

0

  2. Reading/using the instructions for use

2

1.3

  3. Removing the test tube from the test pack

0

0

  4. Removing the cap from the test tube

4

2.7

  5. Placing the tube into the stand

27

18

  6. Removing the test device from the test pack

0

0

 Conduct of the test

  7. Touching the flat pad

9

6

  8. Incorrect manipulation to collect oral fluid

36

24

  9. Wrong placing of the test device in the test tube

9

6

  10. Test device came out of the tube while testing

0

0

  11. Spilling fluid or pouring fluid out of the tube

17

11.3

  12. Improper time keeping

80

53.3

Observed difficulties with testing steps

 1. Opening the package

27

18

 6. Sliding the tube into the stand

72

48

Assistance provided

 1. Opening the package

21

14

 2. Opening and removing the cap from the tube

6

4

 3. Placing the tube into the stand

69

46

 4. Placing the test device into the tube

11

7.3

 5. Keeping time

56

37.3

 6. Reading the results

17

11.3

Errors observed for at least one step

107

71.3

Experienced difficulties for at least one step

85

56.7

Assistance provided for at least one step

117

78

Completed all testing steps correctly without any assistance and interpreted the test results correctly

22

14.7