Table 1 Subject Characteristics: Medicare Part B Beneficiaries with Spinal Pain, 2012–2016

Age in years: n (%)

–

–

 < 0.0001

65–74

26,189 (56.2)

6420 (68.6)

–

75–84

14,534 (31.2)

2324 (24.8)

–

85 + 

5870 (12.6)

612 (6.5)

–

Sex: n (%)

 < 0.0001

Male

14,285 (30.7)

3179 (34)

–

Female

32,308 (69.3)

6177 (66)

–

Race/ethnicity: n (%)

–

–

 < 0.0001

Black

4722 (10.1)

342 (3.7)

–

White

34,405 (73.8)

8351 (89.3)

–

Other/ Unknown

7466 (16)

663 (7.1)

–

Diagnosis category: n (%)

–

–

 < 0.0001

1

31,389 (67.4)

5685 (60.8)

–

2

13,975 (30)

3530 (37.7)

–

3

1229 (2.6)

141 (1.5)

Mean Charlson comorbidity score

1.71

1.17

 < 0.0001