Table 1 Summary of the participant and study characteristics of included publications

Mean age in years of participants (range 28–77 years)^a

49.1 (9.5)

50.0 (10.0)

Mean BMI of participants (range 30–42)^{a, b}

34.5 (3.7)

34.5 (3.9)

Mean percentage of females per study (range 0-100%)^{a, b}

79.2% (29.7)

73.1% (32.7)

Mean percentage of white participants per study (range 0-100%)^{a, b}

59.6% (31.3)

59.0% (36.3)

Study design ^c

Frequencies for self-efficacy analysis

Frequencies for physical activity analysis

Controlled trials

25

18

Pre-post design

36

24

Type of self-efficacy measured ^d

Frequencies for self-efficacy analysis

Frequencies for physical activity analysis

Task self-efficacy

9

N/A

Barrier self-efficacy

47

N/A

Combined barrier and task self-efficacy

1

N/A

Other/unclear

3

N/A