Table 3 Assessment methods and reported outcome variables in the articles included in the systematic review

Studies with multiple articles

 EB 58.2

3

EB [14–16]

 IPS

3

IPS [19–21]

 WHO global health observatory

3

WHO [4, 22, 23]

 EPIC

2

EPIC [24, 25]

 IPEN

2

IPEN [26, 27]

 WHS

2

WHS [28, 29]

Assessment method

  Questionnaire

22

EB [14–16], IPS [19–21], WHO [4, 22, 23], EPIC [24, 25], WHS [28, 29], [17, 18], [30–36]

  IPAQ-short

11

EB [14–16], IPS [19–21], WHS [28, 29], [17, 18], [31]

  IPAQ-long

3

[30, [32], [35]

  IPAQ-unknown

1

[33]

  Standardized lifestyle questionnaire

2

EPIC [24, 25]

  ENERGY parent questionnaire

1

[34]

  Single-item

1

[36]

  Unspecified/multiple

3

WHO [4, 22, 23]

  Accelerometer (Actigraph)

3

IPEN [26, 27], [37]

  ≥1952 counts per minute

2

IPEN [26, 27]

  ≥2000 counts per minute

1

[37]

Reported outcomes

  Total physical activity

22

EB [14–16], IPS [19–21], WHO [4, 22, 23], IPEN [26, 27], WHS [28, 29], [17, 18], [30–34], [36, 37]

  % insufficiently active

8

EB [14], WHO [4, 22, 23], WHS [28, 29], [18, 33]

  MET-hours/week

1

EB [15]

  % sufficiently active

8

EB [16, 18] IPS [20, 21], IPEN [26, 30, 34, 36]

  Days/week and minutes/day MPA and VPA

1

[17]

  MET-minutes/week

1

[18]

  % low; moderate; high physical activity

3

IPS [19, 30, 31]

  Minutes/day MVPA

4

IPEN [26, 27, 32, 37]

  Counts/min

1

IPEN [27]

  Physical activity in leisure time

4

EPIC [24, 25, 32, 35]

  Hours/week total recreational activity

1

EPIC [24]

  MET-hours/week household and recreational PA

1

EPIC [25]

  Minutes/week MVPA in leisure time

1

[32]

  Minutes/day MVPA in leisure time

1

[35]

Operationalization of physical (in)activity

 3000 MET-min/7 days, or 1500 MET-min VPA/3 days

2

EB [14, 16]

 150 min/week MPA or 75 min/week VPA

2

IPS [18, 20]

 30 min MPA 5 d/week, 20 min VPA 3 d/week, or 600 MET-min/week

7

IPS [21], WHO [4, 22, 23], WHS [28–30]

 420 min/week MPA or 210 min/week VPA

1

IPEN [26]

 5 days/week 30 min MVPA

2

[33] (NI) [36]

 150 min/week MPA or 60 min/week VPA

1

[33] (I&SC)

 30 min/day MVPA

1

[34]