Table 3.

Non-parametric analysis of categorical variables

Variables	Grouped by G		Grouped by G
	χ² value	P value	χ² value	P value
LE	50.17	< 0.001	91.34	< 0.001
GBsiz	22.18	< 0.001	21.00	< 0.001
HVW	22.14	< 0.001	33.34	< 0.001
GBsm	20.07	< 0.001	78.99	< 0.001
Lsur	18.31	< 0.001	66.92	< 0.001
U	13.66	< 0.01	32.07	< 0.001
GBst	8.45	< 0.05	6.06	> 0.05