Table 2.
Complications and utilization according to type of index operation. Tabled figures are numbers (%) of patients with a particular complication, or mean values.
| Interspinous process spacer | Interspinous spacer plus decompression | Decompression alone | Fusion | P-value | |
|---|---|---|---|---|---|
| N for measures that include mortality | 3965 | 1644 | 76520 | 16955 | |
| N for safety & utilization measures | 3912 | 1617 | 75310 | 16623 | |
| Wound complications, 30 days | 30 (0.8) | 21 (1.3) | 1343 (1.8) | 548 (3.3) | <0.001 |
| Cardiopulmonary or stroke complications, 30 days | 39 (1.0) | 21 (1.3) | 1192 (1.6) | 473 (2.9) | <0.001 |
| Death within 30 days | 7 (0.18) | 7 (0.43) | 240 (0.31) | 102 (0.60) | <0.001 |
| Life-threatening complications (either of previous 2 rows) | 45 (1.2) | 25 (1.6) | 1351 (1.8) | 553 (3.3) | <0.001 |
| All cause rehospitalization within 30 days | 175 (4.5) | 92 (5.7) | 4985 (6.6) | 1568 (9.4) | <0.001 |
| OR,‡ wound complications, 30days (95% CI)* | 0.42 (0.29, 0.60) | 0.70 (0.46, 1.09) | 1.00 (ref) | 1.85 (1.67, 2.05) | |
| OR for rehospitalization | 0.62 (0.53, 0.73) | 0.81 (0.65, 1.00) | 1.00 (ref) | 1.53 (1.44, 1.63) | |
| OR,‡ Life-threatening complications (95%CI)* | 0.59 (0.43, 0.79) | 0.79 (0.53, 1.18) | 1.00 (ref) | 2.03 (1.83, 2.24) | |
| Mean hospital stay, d (sd) | 1.5 (1.5) | 1.8 (2.0) | 2.7 (2.4) | 4.1 (3.3) | <0.001 |
| Mean Payment, $ (sd) | 8,312 (3035) | 8,997 (4434) | 5925 (3149) | 20,101 (9117) | |
| Adjusted length of stay† (95% CI) | 1.44 (1.36,1.51) | 1.76 (1.63, 1.88) | 2.67 (2.65 – 2.69) | 4.12 (4.09 – 4.16) | <0.001 |
| Adjusted Payment,$† (95% CI) | 8,227 (8073, 8373) | 8,909 (8679, 9139) | 5,923 (5886, 5955) | 20,140 (20,068, 20212) | <0.001 |
*
Logistic regression model adjusting for age, sex, comorbidity score, and number of hospitalizations in previous year
†
Linear regression models adjusting for age, sex, comorbidity score, and number of hospitalizations in previous year; payments do not include professional fees.
‡
OR= odds ratio