Table 3.
Psoas measurements and associations with postoperative adverse events
| Psoas measurements | All patients (n = 468) | Adverse event (n = 62) | No adverse event (n = 406) | Univariate logistic regression, OR (95% CI) | Multivariate logistic regression, OR (95% CI) |
|---|---|---|---|---|---|
| SMD, HU, mean (SD) | 49.7 (10.8) | 48.9 (9.01) | 49.8 (11.0) | 0.99 (0.97–1.02) P = 0.53 | NS |
| SMI, cm2/m2, mean (SD) | 49.3 (1.53) | 45.3 (1.51) | 49.9 (1.51) | 0.81 (0.66–0.97) P = 0.03 | NS |
| SMI below sex-specific median,∗ n (%) | 234 (50.0) | 41 (66.1) | 193 (47.5) | 2.16 (1.24–3.84) P = 0.007 | NS |
| SMI in lowest sex-specific quartile,† n (%) | 116 (24.8) | 25 (40.3) | 91 (22.4) | 2.34 (1.33–4.07) P = 0.003 | 2.53 (1.41–4.50) P = 0.002 |
Multivariate logistic regression was performed for significant univariate predictors (mean skeletal muscle density [SMI], SMI below sex-specific median, and SMI in lowest sex-specific quartile). Boldface indicates statistical significance.
CI, confidence interval; HU, Hounsfield unit; NS, not significant; OR, odds ratio; SD, standard deviation; SMD, skeletal muscle density.
∗
SMI below sex-specific median in our study population was < 52.6 cm2/m2 for male patients and < 40.9 cm2/m2 for female patients.
†
SMI in the lowest sex-specific quartile in our study population was < 42.9 cm2/m2 for male patients and < 33.6 cm2/m2 for female patients.