Table 5 Summary of the different formats for numerical rating scales used across all 228 clinical trials. These are used to assess a wide range of domains including tinnitus loudness annoyance, awareness, distress and tinnitus-related quality of life

Numerical rating scale (0–3)

1

0 %

0

-

Numerical rating scale (0–10)

49

10 %

18

3 %

Numerical rating scale (0–100)

18

4 %

13

2 %

Numerical rating scale (1–9)

0

-

1

0 %

Numerical rating scale (1–10)

12

2 %

0

-

Numerical rating scale (1–100)

1

0 %

0

-

Numerical rating scale (4 points)

3

1 %

2

0 %

Numerical rating scale (5 points)

2

0 %

2

0 %

Numerical rating scale (7 points)

3

1 %

0

-

Numerical rating scale (10 points)

0

-

1

0 %

Numerical rating scale (10-cm line)

5

1 %

14

2 %