Table 2.

The LOS due to HAI in different regions.

Regions	n	Case group		Control group		Increased LOS	t	P
		$\stackrel{-}{\mathrm{x}}$	SD	$\stackrel{-}{\mathrm{x}}$	SD
South	226	22.9	2.3	10.3	2.1	12.6	16.24	<0.01
Northeast	117	22.2	2.1	10.1	1.9	12.1	10.22	<0.01
North	501	23.3	1.8	11.9	1.8	11.4	23.25	<0.01
East	720	20.1	1.9	10.2	1.9	9.9	26.61	<0.01
Centre	209	20.6	2.0	11.0	1.9	9.6	14.84	<0.01
Southwest	148	20.5	2.0	11.8	1.9	8.7	9.28	<0.01
Northwest	198	19.9	1.8	11.7	1.8	8.2	12.68	<0.01
Total	2119	21.3	1.9	10.9	1.9	10.4	45.13	<0.01