Table 1.
Personal characteristics, coexisting illnesses, and measures of health status for both treatment groups in aggregate and propensity matched cohorts. Values are numbers (percentages) unless stated otherwise
| Variables | Aggregate cohort | P value | Propensity matched cohort | P value | ||
|---|---|---|---|---|---|---|
| Laminectomy group (n=414) | Microdecompression group (n=471) | Laminectomy group (n=246) | Microdecompression group (n=246) | |||
| Age (years) | 70.1 | 66.6 | <0.001 | 69.1 | 68.0 | 0.113 |
| Female sex | 205 (49.5) | 222 (47.1) | 0.479 | 116 (47.2) | 103 (41.9) | 0.267 |
| Married or partner | 282 (68.1) | 353 (74.9) | 0.024 | 177 (72.0) | 183 (73.6) | 0.762 |
| Attended college | 75 (18.1) | 133 (28.2) | <0.001 | 53 (21.5) | 52 (21.1) | 1.000 |
| Body mass index | 28.1 | 27.2 | 0.005 | 27.5 | 27.7 | 0.968 |
| Current smoker | 80 (19.3) | 120 (25.5) | 0.034 | 59 (24.0) | 59 (24.0) | 1.000 |
| Comorbidity | 223 (53.9) | 264 (56.1) | 0.514 | 139 (56.5) | 129 (52.4) | 0.430 |
| ASA grade >2 | 116 | 100 | 0.024 | 72 | 54 | 0.076 |
| Preoperative ODI score | 42.5 | 38.6 | <0.001 | 40.5 | 40.0 | 0.820 |
| Preoperative EQ-5D | 0.33 | 0.38 | 0.046 | 0.35 | 0.34 | 0.912 |
| Preoperative diagnostic imaging: | ||||||
| MRI | 395 | 463 | 0.013 | 233 (94.7) | 241 (98.0) | 0.096 |
| CT | 46 | 22 | <0.001 | 28 (11.4) | 11 (4.5) | 0.007 |
| Severity of stenosis* (n=162): | 62 | 98 | 28 | 46 | ||
| A | 1 | 0 | 0.324 | 1 | 0 | 0.317 |
| B | 12 | 12 | 5 | 6 | ||
| C | 33 | 54 | 15 | 21 | ||
| D | 16 | 32 | 7 | 19 | ||