Table 2 Postoperative clinical outcomes for responsive non-respondents and respondents operated for lumbar spinal stenosis
From: Characteristics and outcomes of patients who did not respond to a national spine surgery registry
N Missing | Responsive non-respondents* Mean (SD) / n (%) | N Missing | Respondents** Mean (SD)/ n (%) | Mean diff (95% CI) or Relative risk (95% CI) | P-value | |
|---|---|---|---|---|---|---|
ODI | N = 64 Missing = 0 | 28.2 (19.9) | N = 333 Missing = 1 | 25.2 (18.9) | 2.99 (-2.1 to 8.1) | 0.250 |
NRS back pain | N = 64 Missing = 0 | 4.6 (3.0) | N = 328 Missing = 5 | 4.1 (2.9) | 0.43 (-0.3 to 1.2) | 0.271 |
NRS leg pain | N = 63 Missing 1 | 4.0 (3.2) | N = 321 Missing = 12 | 3.9 (3.1) | 0.15 (-0.7 to 1.0) | 0.719 |
Success by GPE*** | N = 63 Missing 1 | 63 (70%) | N = 330 Missing = 3 | 330 (79%) | 0.89 (0.8 to 1.1) | 0.183 |