Table 3 Measurement model for latent factors and indicator variables

Perceived self-efficacy

Cronbach’s alpha: 0.91

1. Confident in ability to get a Dr. to pay attention to what you say

1–5^a

4.44 (0.81)

0.71

2. Confident in ability to know what questions to ask

1–5^a

4.29 (0.89)

0.60

3. Confident in ability to get a Dr. to answer all questions

1–5^a

4.31 (0.78)

0.79

4. Confident in ability to ask Dr. questions about chief concern

1–5^a

4.50 (0.73)

0.77

5. Confident in ability to make most of visit with Dr.

1–5^a

4.44 (0.77)

0.80

6. Confident in ability to get Dr. take chief concern seriously

1–5^a

4.44 (0.77)

0.83

7. Confident in ability to understand what Dr. tells you

1–5^a

4.56 (0.64)

0.46

8. Confident in ability to get a Dr. to do something about concern

1–5^a

4.44 (0.69)

0.83

1. Confident in ability to explain chief health concern to Dr.

1–5^a

4.43 (0.77)

0.63

2. Confident in ability to ask Dr. for more information

1–5^a

4.54 (0.64)

0.67

Satisfaction with shared decision-making

Cronbach’s alpha: 0.94

1. Dr. made it clear that a decision needs to be made

1–6^b

5.04 (1.12)

0.53

2. Dr. wanted to know exactly how I wanted to be involved

1–6^b

5.01 (1.09)

0.74

3. Dr. told me there are different option for treatment

1–6^b

4.86 (1.29)

0.70

4. Dr. explained adv/disadv of treatment options

1–6^b

4.94 (1.18)

0.85

5. Dr. helped me to understand all info

1–6^b

5.18 (1.02)

0.78

6. Dr. asked me what option I prefer

1–6^b

4.81 (1.32)

0.80

7. Dr. and I weight options

1–6^b

4.75 (1.37)

0.84

8. Dr. and I selected a treatment option together

1–6^b

4.68 (1.44)

0.86

9. Dr. and I reached an agreement on how to proceed

1–6^b

5.05 (1.08)

0.86

Asthma control

Cronbach’s alpha: 0.84

1. Recode of item: number of days child has symptoms

1–4^c

1.49 (0.87)

0.67

2. Recode of item: number of days child had to use rescue asthma medicine

1–4^c

1.31 (0.65)

0.71

3. Recode of item: number of days child had an asthma attack

1–4^c

1.58 (0.90)

0.82

4. Recode of item: how much did child’s asthma limit activities

1–4^c

1.40 (0.75)

0.72

5. Recode of item: how many nights did asthma wake him/her up

1–3^d

1.28 (0.54)

0.71

Asthma-specific HRQoL

Cronbach’s alpha: 0.87

3. Felt scared because of breathing

1–5^e

2.35 (1.13)

0.53

4. Chest felt tight because of asthma

1–5^e

2.50 (1.26)

0.70

5. Felt wheezy

1–5^e

2.99 (1.27)

0.73

6. Trouble breathing

1–5^e

3.07 (1.26)

0.79

7. Trouble sleeping

1–5^e

2.42 (1.22)

0.59

8. Hard to play sports or exercise

1–5^e

2.79 (1.43)

0.65

9. Hard to take a deep breath

1–5^e

2.48 (1.24)

0.68

10. Asthma bothered me

1–5^e

2.95 (1.37)

0.73