Table 1 Exploratory factor analysis results for component one (Items 1–25)

Mum doesn’t encourage me to be PA

.661

Dad doesn’t encourage me to be PA

.795

Dad doesn’t help me be PA

.691

Mum doesn’t help me be PA

.589

Mum isn’t physically active with me

.659

Dad isn’t physically active with me

.795

I don’t have proper equipment to play sport

.754

I don't have anyone to be PA with

.617

I don’t like how being PA makes me feel

.568

There are no parks/sporting grounds near where I live

.410

I don’t like physical activity

.646

I don’t think I am very good at PA

.585

I prefer to watch TV or play electronic games

.558

I look funny when I am physical activity

.508

I am scared that I might get hurt if I played a sport

.464

I have an injury that prevents me being PA

.783

I have a health problem

.775

Others laugh at me when I am PA

.681

Dad thinks education is more important than PA

.848

Mum thinks education is more important than PA

.791

Dad does a lot of physical activity^⌂

.834

Mum does a lot of physical activity^⌂

.710

Eigen value

5.1

2.3

1.9

1.8

1.7

1.4

Cronbach's alpha (α)

0.8

0.6

0.6

0.7

0.8

0.6

Percent variance explained (%)

20.2

9.4

7.2

7.2

6.9

5.8

Weighted factor based scale score^a (median & IQR)

16.8 (14.5, 19.4)

9.9 (8.9, 11.1)

11.2 (10.0, 12.6)

11.2 (9.6, 11.2)

3.3 (3.3, 5.8)

4.7 (3.9, 6.9)

Unweighted factor based scale score^b (median & IQR)

24.5 (21.0, 28.0)

17.0 (15.0, 19.0)

20.0 (18.0, 23.0)

15.0 (13.0, 15.0)

4.0 (4.0, 7.0)

6.0 (5.0, 9.0)