Table 2.

Restricted cubic spline models on regression for risks of acute and chronic orofacial pain.

Characteristic	Sleep duration		Snoring	Easy getting up	Insomnia	Daytime dozing	Daytime napping	Morningness chronotype
	OR (95% CI)	P-nonlinear	OR (95% CI)	OR (95% CI)	OR (95% CI)	OR (95% CI)	OR (95% CI)	OR (95% CI)
Non-adjusted
Acute	1.12 (0.90,1.39)	0.844	1.06 (0.86,1.30)	0.68 (0.51,0.91) ∗∗	1.25 (0.98,1.59)	1.06 (0.81,1.37)	1.11 (0.89,1.37)	1.01 (0.81,1.27)
Chronic	1.36 (1.04,1.78) ∗	0.040∗	0.97 (0.70,1.35)	0.76 (0.49,1.18)	1.06 (0.72,1.56)	1.22 (0.83,1.80)	1.17 (0.84,1.63)	0.78 (0.56,1.09)
Adjusted for demographic characteristics
Acute	1.11 (0.89,1.37)	0.882	0.16 (0.94,1.45)	0.76 (0.56,1.01)	1.22 (0.95,1.56)	1.08 (0.83,1.41)	1.18 (0.95,1.46)	0.97 (0.78,1.21)
Chronic	1.10 (1.03,1.16) ∗	0.028∗	1.18 (0.84,1.66)	0.87 (0.56,1.35)	0.98 (0.66,1.45)	1.23 (0.83,1.82)	1.28 (0.92,1.79)	0.74 (0.53,1.04)
Adjusted for demographic characteristics and psychosocial factors
Acute	1.10 (0.89,1.37)	0.848	1.16 (0.93,1.44)	0.78 (0.59,1.05)	1.17 (1.50,0.92)	1.08 (0.83,1.41)	1.16 (0.93,1.44)	0.97 (0.78,1.21)
Chronic	1.21 (1.11,1.34) ∗	0.027∗	1.18 (0.84,1.66)	0.86 (0.55,1.35)	0.98 (0.66,1.45)	1.23 (0.83,1.82)	1.29 (0.92,1.80)	0.74 (0.53,1.04)
Adjusted for demographic characteristics, psychosocial factors, and health factors
Acute	1.10 (0.89,1.37)	0.863	1.15 (0.92,1.42)	0.79 (0.59,1.05)	1.17 (0.92,1.50)	1.09 (0.84,1.42)	1.16 (0.93,1.44)	0.98 (0.79,1.23)
Chronic	1.12 (1.09,1.29) ∗	0.032∗	1.17 (0.84,1.66)	0.87 (0.55,1.35)	0.98 (0.66,1.46)	1.24 (0.83,1.83)	1.28 (0.91,1.79)	0.75 (0.53,1.05)

Notes: ∗P < 0.05; ∗∗P < 0.01.

Abbreviations: OR: Odds ratio; CI: Confidence interval.