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) | |
 2006–2010 | 12(29) | |
 2011–2016 | 25(60) | |
Study design | ||
 Longitudinal | 9(21) | |
 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) | |
 100 ≤ n <500 | 11(26) | |
 500 ≤ n <1000 | 9(21) | |
 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) | |
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) | |
Method of PA measurementa | ||
 Objective measurement of PA | 9(21) |  |
  Reported reliability or validity | 1(2) | [25] |
  Mention of original reference | 3(7) | |
  None reported | 5(12) | |
 PA measured by questionnaires | 35(83) |  |
  Reported reliability and validity | 5(12) | |
  Reported reliability or validity | 8(19) | |
  Mention of original reference | 14(33) | |
  None reported | 8(19) |