Table 7.

Demographics of Patients With Lumbar Spine Degenerative Conditions Undergoing Fusion or Nonoperative Treatment Within Humana Database^a.

Variable	Number of Patients With Lumbar Degeneration	Fusion Cases			Nonoperative Cases
		Number	Incidence	P Value	Number	Incidence	P Value
Sex
Female	530 888	18 370	3.5		206 415	38.9
Male	383 190	18 084	4.7		138 824	36.2
				.0172			.2362
US geographical region
Midwest	240 760	10 238	4.3		106 094	44.1
Northeast	21 745	373	1.7		8018	36.9
South	553 994	22 022	4.0		196 649	35.5
West	95 035	3766	4.0		33 636	35.4
				.0401			.3296
Age
30-34 years	13 308	690	5.2		5959	44.8
35-39 years	19 617	995	5.1		8434	43.0
40-44 years	28 426	1277	4.5		11 610	40.8
45-49 years	41 543	1841	4.4		15 789	38.0
50-54 years	58 823	2475	4.2		21 268	36.2
55-59 years	70 551	3014	4.3		24 897	35.3
60-64 years	76 843	3561	4.6		27 293	35.5
65-69 years	192 093	9119	4.7		75 442	39.3
70-74 years	155 466	6815	4.4		60 708	39.0
75-79 years	114 283	4138	3.6		43 706	38.2
80-84 years	78 690	1940	2.5		29 059	36.9
85-89 years	19 392	253	1.3		6857	35.4
>90 years	45 043	336	0.7		14 217	31.6
				<.0001			<.0001
Year of procedure
2008	122 880	5208	4.2		48 706	39.6
2009	124 846	5017	4.0		48 163	38.6
2010	145 181	5833	4.0		55 794	38.4
2011	159 483	6006	3.8		59 734	37.5
2012	167 269	6574	3.9		61 070	36.5
2013	194 419	7816	4.0		71 772	36.9
				.2409			.9189
Total	914 078	36 454	4.0		345 239	37.8

^aIncidence (per 100 patients).