TABLE 1.
Patient demographics and operative data
| Microdiscectomy | Decompression | Fusion | |
|---|---|---|---|
| No. of patients |
397 |
965 |
509 |
| Age, yrs |
48.38 ± 15.35 |
59.12 ± 17.06 |
59.52 ± 12.38 |
| BMI, kg/m2 |
26.76 ± 5.04 |
27.47 ± 4.98 |
28.09 ± 5.96 |
| Sex |
|
|
|
| Male |
237 (59.7) |
589 (61.0) |
253 (49.7) |
| Female |
160 (40.3) |
376 (39.0) |
256 (50.3) |
| Age-adjusted CCI |
1.22 ± 1.63 |
2.37 ± 2.13 |
2.18 ± 1.68 |
| Race |
|
|
|
| White or Caucasian |
327 (82.4) |
816 (84.6) |
424 (83.3) |
| Black or African American |
11 (2.8) |
27 (2.8) |
23 (4.5) |
| American Indian or Alaska Native |
1 (0.3) |
2 (0.2) |
0 (0.0) |
| Asian |
17 (4.3) |
39 (4.0) |
15 (2.9) |
| Other |
22 (5.5) |
44 (4.6) |
26 (5.1) |
| Unavailable |
8 (2.0) |
15 (1.6) |
9 (1.8) |
| Patient declined |
11 (2.8) |
22 (2.3) |
12 (2.4) |
| Insurance type |
|
|
|
| Medicare |
55 (13.9) |
341 (35.3) |
118 (23.2) |
| Workers’ compensation |
6 (1.5) |
8 (0.8) |
14 (2.8) |
| Commercial/private |
307 (77.3) |
557 (57.7) |
351 (69.0) |
| Medicaid |
5 (1.3) |
7 (0.7) |
3 (0.6) |
| Other |
22 (5.5) |
46 (4.8) |
21 (4.1) |
| Unavailable |
2 (0.5) |
6 (0.6) |
2 (0.4) |
| ASA Class |
|
|
|
| I |
102 (25.7) |
128 (13.3) |
46 (9.0) |
| II |
263 (66.2) |
710 (73.6) |
409 (80.4) |
| III |
24 (6.0) |
109 (11.3) |
50 (9.8) |
| IV |
3 (0.8) |
3 (0.3) |
0 (0.0) |
| Missing |
5 (1.3) |
15 (1.6) |
4 (0.8) |
| No. of levels |
|
|
|
| 1 |
385 (97.0) |
796 (82.5) |
379 (74.5) |
| 2 |
11 (2.8) |
144 (14.9) |
106 (20.8) |
| 3 |
1 (0.3) |
22 (2.3) |
24 (4.7) |
| 4 |
0 (0.0) |
2 (0.2) |
0 (0.0) |
| 5 |
0 (0.0) |
1 (0.1) |
0 (0.0) |
| EBL, mL |
21.90 ± 27.83 |
21.01 ± 56.22 |
102.33 ± 184.23 |
| Operative time, mins |
60.56 ± 28.75 |
71.81 ± 35.62 |
144.39 ± 80.40 |
| Postoperative LOS, hrs | 10.67 ± 16.58 | 16.65 ± 31.04 | 43.54 ± 40.29 |
ASA = American Society of Anesthesiologists; EBL = estimated blood loss; LOS = length of stay.
Values are presented as the number of patients (%) or mean ± SD.