Table 3. Primary and Secondary Outcomes After Matchinga.
| Outcome | No. (%) of Patients | Absolute Risk Difference, % (95% CI) | P Valueb | |
|---|---|---|---|---|
| ≤24 Hours (n = 13 731) |
>24 Hours (n = 13 731) |
|||
| Primary Outcome | ||||
| 30-d Mortality | 790 (5.8) | 898 (6.5) | 0.79 (0.23 to 1.35) | .006 |
| Secondary Outcomes | ||||
| Mortality, d | ||||
| 90 | 1463 (10.7) | 1649 (12.0) | 1.35 (0.61 to 2.10) | <.001 |
| 365 | 2654 (19.3) | 2971 (21.6) | 2.31 (1.47 to 3.25) | <.001 |
| Pulmonary embolism, d | ||||
| 30 | 96 (0.7) | 166 (1.2) | 0.51 (0.28 to 0.74) | <.001 |
| 90 | 118 (0.9) | 191 (1.4) | 0.53 (0.28 to 0.78) | <.001 |
| 365 | 152 (1.1) | 228 (1.7) | 0.55 (0.28 to 0.83) | <.001 |
| Deep venous thrombosis, d | ||||
| 30 | 111 (0.8) | 136 (1.0) | 0.18 (−0.04 to 0.40) | .11 |
| 90 | 169 (1.2) | 190 (1.4) | 0.15 (−0.11 to 0.42) | .26 |
| 365 | 255 (1.9) | 259 (1.9) | 0.03 (−0.29 to 0.35) | .86 |
| Pneumonia, d | ||||
| 30 | 506 (3.7) | 637 (4.6) | 0.95 (0.48 to 1.43) | <.001 |
| 90 | 671 (4.9) | 800 (5.8) | 0.94 (0.41 to 1.47) | <.001 |
| 365 | 1101 (8.0) | 1245 (9.1) | 1.05 (0.39 to 1.71) | .002 |
| Myocardial infarction, d | ||||
| 30 | 107 (0.8) | 160 (1.2) | 0.39 (0.15 to 0.62) | .001 |
| 90 | 126 (0.9) | 181 (1.3) | 0.40 (0.15 to 0.65) | .002 |
| 365 | 184 (1.3) | 231 (1.7) | 0.34 (0.06 to 0.63) | .02 |
| Composite outcome, dc | ||||
| 30 | 1383 (10.1) | 1680 (12.2) | 2.16 (1.43 to 2.89) | <.001 |
| 90 | 2153 (15.7) | 2492 (18.1) | 2.47 (1.59 to 3.34) | <.001 |
| 365 | 3568 (26.0) | 4009 (29.2) | 3.21 (2.17 to 4.25) | <.001 |
| Negative tracer outcomes, dd | ||||
| Hardware removal | ||||
| 30 | 54 (0.4) | 47 (0.3) | −0.05 (−0.19 to 0.09) | .49 |
| 90 | 156 (1.1) | 140 (1.0) | −0.12 (−0.36 to 0.13) | .35 |
| 365 | 384 (2.8) | 347 (2.5) | −0.27 (−0.65 to 0.11) | .16 |
| Postoperative hip dislocation | ||||
| 30 | 24 (0.2) | 28 (0.2) | 0.05 (−0.07 to 0.13) | .58 |
| 90 | 43 (0.3) | 43 (0.3) | 0 (−0.13 to 0.13) | >.99 |
| 365 | 59 (0.4) | 54 (0.4) | −0.04 (−0.19 to 0.12) | .64 |
a
Greedy matching occurred 1:1 on the logit of a propensity score with a caliper of 0.2 × SD; 96.9% of eligible patients who found matches.
b
P values were calculated using the McNemar test.
c
Mortality and other medical complications.
d
Surgical complications presumed to be unrelated to wait times were assessed as negative tracer outcomes intended to test the specificity of the findings.