Correlation between Parental-Reported Tooth Grinding and Sleep Disorders: Investigation in a Cohort of 741 Consecutive Children

Table 1

Mean values and SD of all items considered with the corresponding p values and r values.

Components	Items	N	Mean	SD	p value	R
Bedtime problems	Movement while falling asleep	682	1.32	0.722	0.000	0.234
	Restless leg	687	1.77	1.097	0.012	0.131
	Falling asleep sweating	679	1.73	1.137	0.000	0.133
	Tingling	686	1.16	0.577	0.001	0.096
Night awakenings	Waking up with leg cramps	687	1.08	0.405	0.000	0.120
	Waking up screaming in the night	682	1.49	0.713	0.001	0.155
Nocturnal symptoms	Nocturnal hyperkinesia	688	2.01	1.162	0.000	0.182
	Unusual movements during sleep	682	1.35	0.772	0.000	0.155
	Pains of unknown origin during sleep	685	1.07	0.306	0.015	0.096
	Nocturnal sweating	680	1.72	1.024	0.000	0.171
	Sleep breathing difficulties	687	1.41	0.847	0.002	0.163
	Sleep apnea	682	1.12	0.500	0.001	0.092
	Snoring	686	1.71	0.980	0.002	0.157
	Nightmares	690	1.20	0.498	0.000	0.152
	Sleep talking	690	1.58	0.786	0.000	0.231
Morning symptoms	Difficulties in waking up in the morning	682	2.00	1.165	0.010	0.124
	Restless sleep	683	1.63	0.852	0.000	0.156