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Table 1 Summary of characteristics of the included papers (N = 42)

From: Factors of physical activity among Chinese children and adolescents: a systematic review

Characteristics of the papers

N(%)

Paper No.

Year of publication

 2002–2005

5(12)

[25–29]

 2006–2010

12(29)

[30–41]

 2011–2016

25(60)

[42–66]

Study design

 Longitudinal

9(21)

[29, 38, 42, 46, 51, 56–59]

 Cross-sectional

33(79)

[25–28, 30–37, 39–41, 43–45, 47–50, 52–55, 60–66]

Sample size

 50 ≤ n <100

4(10)

[25, 35, 53, 59]

 100 ≤ n <500

11(26)

[26, 28, 33, 39, 42, 44, 47, 50, 56, 60, 62]

 500 ≤ n <1000

9(21)

[29, 30, 36, 38, 46, 54, 58, 61, 66]

 1000 ≤ n <10,000

16(38)

[27, 31, 32, 34, 37, 41, 43, 45, 48, 51, 52, 55, 57, 63–65]

 n >10,000

2(5)

[40, 49]

Age group

 Children (3–12 years.)

17(40)

[25, 28, 33, 36, 37, 39, 42, 44, 47, 50, 53, 56, 58–60, 64, 66]

 Adolescent (13–18 years.)

20(48)

[26, 29–32, 35, 38, 40, 41, 45, 46, 49, 51, 52, 54, 55, 61–63, 65]

 Both (3–18 years.)

5(12)

[27, 34, 43, 48, 57]

Method of PA measurementa

 Objective measurement of PA

9(21)

 

  Reported reliability or validity

1(2)

[25]

  Mention of original reference

3(7)

[53, 60, 61]

  None reported

5(12)

[35, 48, 56, 58, 59]

 PA measured by questionnaires

35(83)

 

  Reported reliability and validity

5(12)

[28, 33, 35, 40, 56]

  Reported reliability or validity

8(19)

[26, 29, 36, 39, 44, 45, 60, 63]

  Mention of original reference

14(33)

[27, 31, 32, 34, 37, 41, 42, 46, 47, 50, 52, 54, 62, 65]

  None reported

8(19)

[30, 38, 43, 49, 55, 57, 64, 66]

  1. aTotals may add up to more than 100%, since two studies included both objective and questionnaire measurement of PA [35, 60]