Table 2 Numbers of studies excluded per diagnostic group and reasons for exclusion. Each column represents a different symptom category

No development/validation paper

13

15

34

3

-

-

Open-ended question(s)

7

2

25

-

-

-

Q not self-administered

1

3

3

1

-

-

No description of development/validation in OA

4

6

19

3

3

1

No definitive Q presented

1

-

-

-

-

-

Off-topic

1

11

15

2

-

-

No English translation

3

2

3

-

-

-

No Q availability

1

6

12

1

-

-

Pediatric Q

-

-

8

5

-

-

Not a Q

1

3

8

-

-

-

1-item Q

3

3

1

-

-

-

Double Q

9

10

11

-

-

-

Semi-structured Q

-

-

2

-

-

-

Total (n = 265)

44

61

141

15

3

1