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Table 2 Equivalency of combined responses across C-ACT items 1–4, for the comparison of response option image selection for Stage 2 scales, (A) modified scale A (simple faces), and (B) scale B (circles of decreasing size) with the original C-ACT

From: Development and equivalence of new faces for inclusion in the Childhood Asthma Control Test (C-ACT) response scale

(A)

Original C-ACT

Scale A

Response option 0

(negative response)

Response option 1

(slight negative response)

Response option 2

(slight positive response)

Response option 3

(positive response)

Response option 0

(negative response)

4*

1

-

-

Response option 1

(slight negative response)

2

4*

2

2

Response option 2

(slight positive response)

4

3

17*

3

Response option 3

(positive response)

3

-

5

14*

(B)

Original C-ACT

Scale B

Response option 0

(negative response)

Response option 1

(slight negative response)

Response option 2

(slight positive response)

Response option 3

(positive response)

Response option 0

(negative response)

3*

1

1

6

Response option 1

(slight negative response)

1

2*

3

1

Response option 2

(slight positive response)

1

1

17*

1

Response option 3

(positive response)

1

1

2

26*

  1. C-ACT, CHILDHOOD ASTHMA CONTROL TEST
  2. *Values in bold represent the same response options images being selected in both scales