Table 4.

School performance by sleep disordered breathing reported by parents and self in Chinese children

	Parent-reported SDB (any) Mean (SD)					Self-reported SDB (any) Mean (SD)
	No/rarely	Sometimes	Usually	F	p	No/rarely	Sometimes	Usually	F	p
Chinese	3.77±0.98	3.68±1.03	3.56±1.04	6.36	0.002**	3.73±1.00	3.54±1.06	3.32±1.01	19.99	0.00***
Math	3.80±1.05	3.74±1.08	3.56±1.12	7.56	0.001**	3.76±1.06	3.54±1.06	3.32±1.01	17.51	0.00***
English	3.85±1.05	3.74±1.11	3.67±1.14	4.64	0.01*	3.79±1.08	3.58±1.09	3.36±1.09	22.26	0.00***

a. SDB (any): any of the SDB symptoms in samples with complete data of three SDB items; SD, standard deviation;

b. *P value of correlation is < 0.05. **P value of correlation is < 0.01. ***P value of correlation is < 0.001;

c. Academic grades were lower in children who usually or sometimes had self- or parent-report SDB symptoms;