Quality criteria^a

Buss et al. (1980)

Bürgi et al. (2011)

Gabel et al. (2011)

Jago et al. (2005)

Jackson et al. (2003)

McKee et al. (2012)

Saudino (2012)

Shen et al. (2013)

Taylor et al. (2009, 2013) ^b

Study attrition and follow-up duration

A. Participation rate at baseline ≥80%

?

0

?

?

?

0

?

1

0

B. Response at follow-up ≥80%

?

?

0

1

0

0

1

1

1

C. Follow-up at least one year

1

0

1

1

1

1

1

0

1

Assessment of determinants

D. Determinants measured with a reliable tool

1

1

1

1

1

0.66

1

1

1

E. Determinants measured with a valid tool

1

0.5

1

1

1

0.66

1

1

1

Assessment of outcome measure

F. Physical activity measured with a reliable tool

1

1

1

1

1

1

1

1

1

G. Physical activity measured with a valid tool

1

1

1

1

1

1

1

1

1

Data analyses

H. Results presented with SD, CI or SE

0

1

1

1

1

1

1

1

1

I. Controlled for confounding

1

1

0

1

0

1

1

0

1

J. Sample size ≥10 times number of independent variables

1

1

0

1

1

0

1

1

1

Quality score (%)^c

70

65

60

90

70

63.2

90

80

90