Table 4.

Comparison of the letter cancelling test mean scores in the OSAHS, PS and control groups.

Mean
Group	OSAHSa	PSb	control
Variable	N=24	N=37	N=20	p
Right answers	46,9	36,4	42,5	0,204
Omitted answers	35,0	45,7	41,1	0,188
Errors	39,0	42,2	41,1	0,374
Time	38,8	41,1	43,5	0,805

Key: OSAHSa: obstructive sleep apnea hypopnea syndrome; PSb: primary snoring

Kruskal-Wallis test