Table 2.

Length of stay and hospital cost per gender, type of spine surgery, COPD and obesity

	Male			Female
	LMD Mean	ACDF Mean	LDF Mean	LMD Mean	ACDF Mean	LDF Mean
No obesity, no COPD
LOS	2	3	6	2	2	6
Hcost ($)	14,322	30,876	58,085	15,309	25,517	56,132
Obesity, no COPD
LOS	1	2	6	2	2	6
Hcost ($)	13,056	27,676	54,346	16,866	26,290	59,580
No obesity, COPD
LOS	2	1	6	1	1	9
Hcost ($)	17,759	27,238	50,436	14,291	24,581	63,068
Obesity, COPD
LOS	2	1	5	1	4	6
Hcost ($)	25,896	23,407	62,457	11,322	46,478	60,658

LOS = Length of stay in days, Hcost = Hospital cost, LMD = Lumbar microdiskectomy, ACDR = Anteriorcervical decompression and fusion, LDF = Lumbar decompression and fusion