Table 4. Odd ratios of less sleep time (h) for each injury by multiple logistic regression analysis with complex sampling.

Types of Injury	Unadjusted		Model 1†		Model 2‡
Sleep Time (h)	AOR (95% CI)	P Value	AOR (95% CI)	P Value	AOR (95% CI)	P Value
Bicycle		0.02*		0.01*		0.01*
< 5.5 h	0.87(0.76–0.99)		1.31(1.12–1.53)		1.31(1.12–1.53)
5.5≤, < 6.5 h	0.84(0.73–0.96)		1.14(0.99–1.31)		1.1(0.99–1.32)
6.5≤, <7.5 h	0.99(0.87–1.12)		1.18(1.03–1.34)		1.17(1.03–1.33)
≥7.5 h	1		1		1
Slip or Fall
Classroom		0.28		<0.001*		< 0.001*
< 5.5 h	1.15(0.99–1.34)		2.07(1.73–2.47)		2.02(1.69–2.42)
5.5≤, < 6.5 h	1.05(0.90–1.23)		1.63(1.37–1.93)		1.61(1.36–1.90)
6.5≤, <7.5 h	0.98(0.9–1.28)		1.36(1.17–1.59)		1.35(1.16–1.58)
≥7.5 h	1		1		1
Corridor		0.07		< 0.001*		<0.001*
< 5.5 h	0.89(0.80–0.99)		1.44(1.27–1.64)		1.42(1.25–1.60)
5.5≤, < 6.5 h	0.91(0.82–1.02)		1.31(1.17–1.47)		1.29(1.15–1.45)
6.5≤, <7.5 h	1.01(0.91–1.11)		1.19(1.07–1.32)		1.18(1.07–1.31)
≥7.5 h	1		1		1
Ground		0.03*		< 0.001*		<0.001*
< 5.5 h	0.94(0.86–1.02)		1.51(1.38–1.66)		1.50(1.37–1.65)
5.5≤, < 6.5 h	1.06(0.97–1.15)		1.52(1.39–1.66)		1.51(1.39–1.65)
6.5≤, <7.5 h	1.03(0.96–1.11)		1.27(1.17–1.37)		1.26(1.17–1.36)
≥7.5 h	1		1		1
Toilet		0.26		< 0.001*		<0.001*
< 5.5 h	1.30(0.99–1.72)		2.04(1.47–2.84)		2.02(1.46–2.81)
5.5≤, < 6.5 h	1.09(0.81–1.47)		1.52(1.11–2.10)		1.52(1.10–2.09)
6.5≤, <7.5 h	1.15(0.83–1.58)		1.34(0.96–1.87)		1.33(0.96–1.86)
≥7.5 h	1		1		1
Stair		< 0.001*		< 0.001*		<0.001*
< 5.5 h	1.32(1.22–1.44)		1.80(1.63–1.99)		1.79(1.62–1.98)
5.5≤, < 6.5 h	1.15(1.05–1.25)		1.44(1.31–1.59)		1.44(1.30–1.58)
6.5≤, <7.5 h	1.06(0.97–1.16)		1.17(1.06–1.28)		1.16(1.06–1.28)
≥7.5 h	1		1		1
Others		0.04*		< 0.001*		<0.001*
< 5.5 h	1.31(1.09–1.57)		1.55(1.26–1.90)		1.58(1.29–1.93)
5.5≤, < 6.5 h	1.15(0.96–1.38)		1.31(1.08–1.59)		1.33(1.10–1.61)
6.5≤, <7.5 h	1.21(1.01–1.46)		1.28(1.07–1.54)		1.28(1.07–1.54)
≥7.5 h	1		1		1
Dental Injury		0.47		0.52		0.49
< 5.5 h	0.99(0.90–1.11)		1.05(0.92–1.19)		1.05(0.92–1.19)
5.5≤, < 6.5 h	0.98(0.88–1.09)		1.01(0.90–1.14)		1.01(0.90–1.14)
6.5≤, <7.5 h	0.93(0.83–1.03)		0.96(0.86–1.07)		0.95(0.86–1.07)
≥7.5 h	1		1		1

* Significance at P < 0.05

† adjusted for age and sex

‡ adjusted for age, sex, physical exercise day, obesity, economic level, and region of residence.