Table 6.

Demographics of Patients With Cervical and Lumbar Degenerative Conditions Within Humana Database^a.

Variable	Total Number of Patients	Cervical Degeneration			Lumbar Degeneration
		Number of Patients	Incidence	P Value	Number of Patients	Incidence	P Value
Sex
Female	24 752 728	389 768	15.7		673 300	27.2
Male	17 836 374	270 953	15.2		487 195	27.3
				.2533			<.0001
US geographical region
Midwest	11 350 495	161 767	14.3		290 266	25.6
Northeast	2 969 893	14 208	4.8		27 250	9.2
South	22 291 680	417 382	18.7		722 773	32.4
West	5 977 034	67 364	11.3		120 206	20.1
				<.0001			.0003
Age
30-34 years	1 208 576	8226	6.8		16 581	13.7
35-39 years	1 320 190	13 809	10.5		24 381	18.5
40-44 years	1 564 938	22 898	14.6		35 659	22.8
45-49 years	1 876 523	35 167	18.7		51 923	27.7
50-54 years	2 252 239	50 176	22.3		75 609	33.6
55-59 years	2 422 075	58 081	24.0		92 787	38.3
60-64 years	2 481 301	59 500	24.0		101 709	41.0
65-69 years	8 291 454	132 637	16.0		241 623	29.1
70-74 years	7 407 680	107 309	14.5		197 519	26.7
75-79 years	5 529 193	76 257	13.8		143 286	25.9
80-84 years	3 944 768	51 667	13.1		97 091	24.6
85-89 years	1 316 296	16 875	12.8		29 588	22.5
>90 years	2 973 869	28 119	9.5		49 560	16.7
				<.0001			<.0001
Year of diagnosis
2008	5 631 917	66 345	11.8		122 880	21.8
2009	4 654 070	70 037	15.0		124 846	26.8
2010	4 928 124	80 461	16.3		145 181	29.5
2011	5 655 649	91 186	16.1		159 483	28.2
2012	6 291 841	97 096	15.4		167 269	26.6
2013	6 921 787	113 386	16.4		194 419	28.1
2014	8 505 714	142 210	16.7		246 417	29.0
				<.0001			<.0001
Total	42 589 102	660 721	15.5		1 160 495	27.2

^aIncidence (per 1000 patients).