The Contribution of Walking to School in Students’ Physical Activity and Its Effect on Being Overweight

Table 1

The association between ACS and weight status in previous studies.

Continent	Negative association	No association	Positive association	Total
North America	(6); [44]; [45]; [46]; [47]; [48]; [49]	(4); [50]; [51]; [52]; [53]	(2); [54]; [40]	(12)
South America	(2); [55]; [56]	(0)	(0)	(2)
Europe	(3); [57]; [58]; [59]	(10); [60]; [61]; [62]; [63]; [64]; [65]; [66]; [67]; [7]; [68]	(1); [69]	(14)
Australia	(1); [70]	(3); [71]; [72]; [73]	(0)	(4)
Asia	(2); [74]; [9]	(0)	(0)	(2)
Total	(14)	(17)	(3)	(34)

The numbers in parentheses show the number of studies in the category.