Table 2 Factor-loading matrix for the 4 major physical activity patterns identified by principal component analysis

School/work – moderate activity

0.75

School/work – walking

0.73

School/work – vigorous activity

0.72

Leisure-time – moderate activity

0.80

Leisure-time – vigorous activity

0.73

Active transportation – cycle

0.61

Yard work – vigorous activity

0.76

Yard work – moderate activity

0.79

Active transportation – walking

0.73

Leisure-time – walking

0.61

Home activity – moderate

0.50

Sitting

Factor intercorrelations

Factor 1 (School/work activity)

–

Factor 2 (Active recreation)

0.13

–

Factor 3 (Yard activity)

0.10

0.13

–

Factor 4 (Walking & domestic activity)

0.12

0.06

0.11

–

Eigenvalues

2.07

1.51

1.43

1.25

Variance explained (%)^b

17.3

12.6

11.9

10.4