Table 1.
Demographic and clinical characteristics of patients.
| Patient characteristics | Non-MMSa (n=336) | MMS (n=679) | Total (N=1015) | |
| Age at surgery (years), mean (SD) | 61.5 (12.7) | 57.9 (12.5) | 59.1 (12.7) | |
| Age at surgery (years), median (Q1, Q3b) | 62 (54, 71) | 58 (49, 68) | 60 (50, 69) | |
| Age at surgery (years), range | 19-88 | 22-88 | 19-88 | |
| Patient sex, n (%) | ||||
|
|
Male | 159 (47.3) | 367 (54.1) | 526 (51.8) |
|
|
Female | 177 (52.7) | 312 (45.9) | 489 (48.2) |
| Payor group, n (%) | ||||
|
|
Commercial | 129 (38.4) | 336 (49.5) | 465 (45.8) |
|
|
Medicare | 169 (50.3) | 276 (40.6) | 445 (43.8) |
|
|
VAc/military/government employee/Medicaid | 32 (9.5) | 55 (8.1) | 87 (8.6) |
|
|
None | 6 (1.8) | 12 (1.8) | 18 (1.8) |
| Procedure, n (%) | ||||
|
|
360 lumbar fusiond | 32 (9.5) | 70 (10.3) | 102 (10.0) |
|
|
Cervical fusione | 166 (49.4) | 393 (57.9) | 559 (55.1) |
|
|
Laminectomy/discectomy | 40 (11.9) | 64 (9.4) | 104 (10.2) |
|
|
Lumbar fusionf | 90 (26.8) | 141 (20.8) | 231 (22.8) |
|
|
Otherg | 8 (2.4) | 11 (1.6) | 19 (1.9) |
| Surgery levels, n (%) | ||||
|
|
1 | 108 (32.1) | 252 (37.1) | 360 (35.5) |
|
|
2 | 121 (36.0) | 220 (32.4) | 341 (33.6) |
|
|
3 | 67 (19.9) | 130 (19.1) | 197 (19.4) |
|
|
4 | 33 (9.8) | 67 (9.9) | 100 (9.9) |
|
|
5 | 5 (1.5) | 7 (1.0) | 12 (1.2) |
|
|
6 | 2 (0.6) | 3 (0.4) | 5 (0.5) |
| Surgery level, median (Q1, Q3) | 2 (1, 3) | 2 (1, 3) | 2 (1, 3) | |
aMMS: ManageMySurgery app.
bQ1, Q3: first and third quartiles.
cVA: Veterans Affairs.
dAnterior approach to lumbar fusion + posterior approach to lumbar fusion.
eIncludes both anterior and posterior cervical fusions.
fIncludes singular approach to lumbar fusion, anterior or posterior.
gIncludes cervical arthroplasty, thoracic fusion, sacroiliac fusion.