Table 3.

Relationships between children’s mode of transport to schools and histone H3 level.

Variables	Duration (minute)				High Histone H3 Level, N (%)	OR	95% CI
	Min	Max	Mean	SD
Comparisons
Car (N = 94)	2	60	14.7	12.7	48 (51.1)
Bus (N = 8)	5	30	15.9	8.3	6 (75.0)
Walk (N = 22)	2	10	6.9	3.4	15 (68.2)
Motorcycle (N = 124)	1	30	10.0	6.1	50 (40.3)
Associations
Open (N = 146)					54 (52.9)	1.40	0.84–2.33
Closed (N = 102)					65 (44.5)