Table 1. Characteristics of patients undergoing 4 procedure types. Tabled figures are numbers of patients (column %).
| Interspinous process spacer alone | Interspinous process spacer with decompression | Decompression alone | Fusion | All patients | P-value for differences between groups | ||
|---|---|---|---|---|---|---|---|
| n | 3,965 | 1,644 | 76,520 | 16,955 | 99,084 | ||
| Mean age, yr (SD) | 76.1 (6.1) | 75.6 (6.1) | 74.8 (5.9) | 73.6 (5.4) | 74.6 (5.8) | <0.001 | |
| Sex, %* | Male | 1,925 (48.6) | 810 (49.3) | 40,473 (51.4) | 7,580 (44.7) | 50,788 (51.3) | <0.001 |
| Female | 2,037 (51.4) | 833 (50.7) | 36,023 (47.1) | 9,370 (55.3) | 48,263 (48.7) | ||
| Race | White | 3,733 (94.2) | 1,529 (93.0) | 71,914 (94.0) | 15,715 (92.7) | 92,891 (93.8) | <0.001 |
| Black | 119 (3.0) | 60 (3.7) | 2,548 (3.3) | 782 (4.6) | 3,509 (3.5) | ||
| Other | 110 (2.8) | 54 (3.3) | 2,034 (2.7) | 453 (2.7) | 2,651 (2.7) | ||
| Quan comorbidity score | 0 | 2,096 (52.9) | 810 (49.3) | 41,262 (54.0) | 8,764 (51.7) | 52,932 (53.4) | <0.001 |
| 1 | 1,207 (30.4) | 559 (34.0) | 23,348 (30.5) | 5,452 (32.2) | 30,566 (30.9) | ||
| 2 | 662 (16.7) | 275 (16.7) | 11,910 (15.6) | 2,739 (16.2) | 15,586 (15.7) | ||
| Hospitalized in previous year | No | 3,245 (81.8) | 1,331 (81.0) | 62,945 (82.3) | 13,840 (81.6) | 81,361 (82.1) | 0.170 |
| Yes | 720 (18.2) | 313 (19.0) | 13,575 (17.7) | 3,115 (18.4) | 17,723 (17.9) | ||
| Diabetes | No | 3,035 (76.5) | 1,196 (72.8) | 58,359 (76.3) | 12,714 (75.0) | 75,304 (76.0) | <0.001 |
| Yes | 930 (23.5) | 439 (27.2) | 18,161 (23.7) | 4,241 (25.0) | 23,780 (24.0) | ||
| Chronic lung disease | No | 3,317 (83.7) | 1,364 (83.0) | 64,331 (84.1) | 14,043 (82.9) | 83,055 (83.8) | <0.001 |
| Yes | 648 (16.3) | 280 (17.0) | 12,189 (15.9) | 2,912 (17.1) | 16,029 (16.2) | ||
*
2,784 patients (2.8%) had missing values for gender